Delirium

Delirium is a zone-wide effect that spawns new enemies and empowers existing ones. The Delirium Mirror version of the encounter is considered Extra Content and has a baseline greater than 8% chance to appear in any non-unique map area. Delirium orbs can also be applied to a map to add a baseline level of deliriousness and rewards; they can also be found with layers of Delirium on them (known as Delirium maps).

Encounter rate

Delirium Mirrors can appear from the Torched Courts in Act 5 onwards at a rate >8%. They stop appearing for characters with level 72 and higher for areas with level lower than 65^[1].

In maps, Delirium Mirrors have a baseline greater than 8% chance to appear in a zone. Delirium maps cannot normally drop but can be obtained from sources of Delirium rewards or with the Pathological notable atlas passive.

Mechanics

Delirium Mirror

Randomly while players are completing the acts or running Maps, a Mirror of Delirium will spawn. They will always spawn within a close distance from the zone entrance. Once a player passes through it, it spawns a gray fog that spreads outwards throughout the map, beginning the Delirium encounter.

Encounter

New enemies and hazards can spawn within the fog and existing enemies can receive a Delirium modifier, making them stronger or giving them new attacks. All enemies in the fog are Delirious, giving them increased damage and damage reduction.

In a Delirium mirror encounter, the further out you are in the fog, the stronger the deliriousness effect. In delirium maps, the deliriousness percentage remains constant.

Enemies killed in the fog in maps can drop Cluster Jewels and Simulacrum SplintersSimulacrum SplinterStack Size: 300Combine 300 Splinters to create a Simulacrum..

As you kill enemies inside the fog, a reward bar on the bottom left will start filling up. For Delirium mirror encounters, filling the bar completely will increase the counter, and cause you to gain the indicated reward type after the Delirium encounter ends. Additionally, when the first bar reaches level 3, a second reward bar will appear at level 1; at level 5, a third reward bar appears, and so on every 2 reward level.

Delirious maps do not grant additional reward bars at certain levels. All reward bars increase in level simultaneously instead and drop the indicated rewards each time you reach a new reward level instead of all at once after the encounter ends.

The Unending Nightmare keystone prevents Delirium mirror encounters from dissipating and also prevents them from being ended manually. Rewards are dropped on reaching a new reward level like Delirious maps, but will still grant an additional reward bar every 2 levels.

Scaling

Higher percentages of Delirium increase both monster damage and monster damage reduction. Through empirical testing and official reference points at 100% Deliriousness, it was possible to obtain the following scaling estimates^[2].

Deliriousness %	Increased damage^[3]	Less damage taken (Unique)^[4]^[2]	Less damage taken (Rare)^[2]	Less damage taken (Magic)^[2]	Less damage taken (Normal)^[2]
20%	6%	16%	18%	20%	19% _(19.2)
40%	12%	32%	36%	40%	38% _(38.4)
60%	18%	48%	54%	60%	58% _(57.6)
80%	24%	64%	73%*	80%	77% _(76.8)
100%	30%	80%	90%	96%*	96%

Additionally, it is speculated that it provides an overall more multiplier to monster item quantity and rarity^[5]^{[better source needed]}. However, there are several caveats to this that are being investigated by the Prohibited Library. Monsters from strongboxes^[6], as well as possibly other monsters that are not immediately spawned on entering an area, do not appear to be affected by this multiplier.

Deliriousness %	More Monster Item Quantity^[5]	More Monster Item Rarity^[5]
20%	10%	20%
40%	20%	40%
60%	30%	60%
80%	40%	80%
100%	50%	100%

Timer

Delirium mirror encounters only last a short period of time. After a certain period of time, the fog will stop spreading and start to dissipate outwards in a donut shape. If you step out of the fog for more than 5 seconds, the Delirium encounter will end. Delirium monsters disappear when they are outside the fog and native monsters will have their Delirium modifiers removed. The encounter can also be prematurely ended by pressing a button on the bottom right (which can be key bound). Certain actions will pause or extend the time before the fog stops spreading. The fog also stops moving while there are no players in the instance.

The following will pause the fog timer:

While no players are present in the instance
During an Immortal Syndicate Research encounter
During an Incursion encounter
During a Legion Timeless Monolith encounter
During a Breach encounter
Being within range of an active Blight
While in the Sacred Grove
While a Ritual Altar is activated

The following will extend the fog timer:

Opening a Strongbox
Defeating a monster holding an Essence
Capturing a red Beast
Defeating an Immortal Syndicate group
An Abyss crack starts moving to the next direction
Completing a Blight encounter
Defeating a Harbinger

The Unending Nightmare Atlas keystone passive prevents the fog from dissipating. It also prevents you from manually ending the Delirium encounter.

Strange Voice

Starting from The Torched Courts (Act 5), a voice starts talking to the player whenever you touch a Mirror of Delirium. He has unique lines in Act zones.

Delirious map modifier

Map items can be affected by a special modifier that covers the entire map in fog permanently. The mechanics are similar to the Delirium mirror encounter that can randomly occur in a map, with the following exceptions:

There is no Delirium Mirror. Delirium is already active from the moment the map begins.
There is no timer. Delirium is permanently present throughout the entire map.
Rewards drop each time the bar is filled, instead of dropping only when the timer expires. The number of reward bars do not increase at certain thresholds.
Delirium orbs cannot drop.

This modifier has five levels of strength, expressed as a percentage -- 20%, 40%, 60%, 80%, or 100%. The higher the percentage, the tougher the monsters and the greater the rewards. Enemies at very high Delirious percentages are extremely difficult, with even normal rarity enemies becoming comparable to high-tier map bosses.

Map items can drop with this modifier present at any of the five levels of strength. Delirium orbs can be used on map items. An orb adds 20% delirium to a map item that does not already have the delirious modifier, or increases the map's existing delirium strength by one level (20%).

Unique bosses

Omniphobia (in any tier map) and Kosis (in T11+ maps) each have a chance to appear equal to the deliriousness percentage. Allocating Delusions of Persecution and its preceding small passive skills increases the chance to spawn these bosses by 156%, guaranteeing boss encounters in maps with at least 40% deliriousness.

Rewards

Icon	Reward	Typical drops
	Miscellaneous	Miscellaneous items
	Weapon	Weapons; can be fractured, synthesised
	Armour	Armour; can be fractured, synthesised
	Jewellery	Jewellery and jewels; can be fractured, synthesised
	Unique	Unique items
	Gem	Gems with quality, can be corrupted level 21 or 23 quality
	Currency	Basic currency, Darker HalfDarker Half35x Eldritch Chaos OrbWhen you find what you're looking for, it's never quite right. When you have what you desire, yet you still want more.
	Divination card	Stacked DeckStacked DeckStack Size: 20A stack of unknown divination cardsRight click to take a divination card out of the deck. per reward level
	Labyrinth	Offering to the GoddessOffering to the GoddessIt is time for the Goddess to give her final verdict. Your fate rests in her even hands.Travel to the Aspirants' Plaza and spend this item to open the Eternal Labyrinth.
	Map fragment	Sacrifice fragments, Mortal fragments
	Map	Maps
	Talisman	Talismans
	Essence	Screaming Essences, Remnant of CorruptionRemnant of CorruptionStack Size: 9Corrupts the Essences trapping a monster, modifying them unpredictably Right click this item then left click a monster trapped by Essences to corrupt them. Corrupted Essences cannot be modified again., Essence Scarabs
	Breach	Breach RingBreach RingProperties are doubled while in a BreachCorrupted, Breach splinters, Breach Scarabs
	Harbinger	Currency shards, Harbinger Scarabs
	Abyss	Abyss jewels, Abyss Scarabs
	Fossil	Fossils
	Scarab	Scarabs
	Legion	Incubators, Legion splinters, Legion Scarabs
	Blight	Oils, Blight Scarabs

Other drops

Simulacrum SplinterSimulacrum SplinterStack Size: 300Combine 300 Splinters to create a Simulacrum., cluster jewels and Delirium orbs are obtained from Delirium encounters.

Possible drops from the bosses, Omniphobia and Kosis:

Unique cluster jewels in maps
Split PersonalitySplit Personality
Crimson JewelLimited to: 2This Jewel's Socket has 25% increased effect per Allocated Passive Skill between
it and your Class' starting location
<Two random modifiers>CorruptedYou need not go looking for a second opinion.Place into an allocated Jewel Socket on the Passive Skill Tree. Right click to remove from the Socket., MegalomaniacMegalomaniac
Medium Cluster JewelAdds 4 Passive Skills
Added Small Passive Skills grant Nothing
<3 Random notable mods>CorruptedIf you're going to act like you're better than everyone else, make sure you are.Place into an allocated Medium or Large Jewel Socket on the Passive Skill Tree. Added passives do not interact with jewel radiuses. Right click to remove from the Socket. and VoicesVoices
Large Cluster JewelAdds 3 Jewel Socket Passive Skills
<Random empty passive skill node mod>CorruptedOnly a madman would ignore a god's instructions.Place into an allocated Large Jewel Socket on the Passive Skill Tree. Added passives do not interact with jewel radiuses. Right click to remove from the Socket. in the SimulacrumSimulacrumHow do you defeat that which dwells within you?Open a Delirium portal by using this item in a personal Map Device. Can only be used once.

List of Delirium modifiers

Some enemies gain an extra Delirium exclusive modifier when delirious.

Name	Monster rarity	Effect(s)
Banishing Flame	Normal/Magic	Periodically, apparition that casts a beam of fire
Cascading Storm	Normal/Magic	Periodically, apparition that casts a line of lightning impacts
Crushing Terror	Normal/Magic
Diluting Touch	Normal/Magic	Diluting Touch debuff on hit
Eroding Touch	Normal/Magic	Eroding Touch debuff on hit
Paralysing Touch	Normal/Magic	Paralysing Touch debuff on hit
Putrify Dead	Normal/Magic	Putrefaction debuff on hit
Shatter Dead	Normal/Magic
Spatial Distortion	Normal/Magic	Periodically, apparition creates an AoE that teleports enemies to the marked location
Spawn Dead	Normal/Magic
Vengeful Blast	Normal/Magic	Fire explosion on death similar to FlameblastFlameblastSpell, AoE, Fire, Channelling Level: (1-20) Cost: (4-7) Mana Cast Time: 0.20 sec Critical Strike Chance: 5.00% Effectiveness of Added Damage: 90%Requires Level 28Channels to build up a large explosion, which is released when you stop using the skill. The longer you channel, the larger the area of effect and damage of the explosion.Deals (31-405) to (46-608) Fire Damage 50% chance to Ignite enemies 165% more Spell Damage for each stage 60% more Damage with Ailments for each stage 10 maximum Stages +0.3 metres to radius per Stage Additional Effects From 1-20% Quality: +(0.05-1) to maximum StagesPlace into an item socket of the right colour to gain this skill. Right click to remove from a socket.
Vengeful Bones	Normal/Magic
Vengeful Chase	Normal/Magic
Vengeful Gang	Normal/Magic	Spawns weak Delirium monsters on death
Vengeful Grip	Normal/Magic	Slow-applying AoE on death
Vengeful Pack	Normal/Magic	Spawns weak Delirium monsters on death
Vengeful Skyfire	Normal/Magic	FirestormFirestormSpell, AoE, Duration, Fire Level: (1-20) Cost: (13-25) Mana Cast Time: 0.75 sec Critical Strike Chance: 6.00% Effectiveness of Added Damage: (60-80)%Requires Level 28Flaming bolts rain down over the targeted area. They explode when landing, dealing damage to nearby enemies.Base duration is 1.40 seconds Deals (23-361) to (35-541) Fire Damage One impact every 0.15 seconds Base radius is 1.3 metres First Impact has 100% more Area of Effect First Impact deals 325% more Damage with Hits and Ailments Maximum 3 Firestorms at a time Additional Effects From 1-20% Quality: Base radius is (0.01-0.2) metresPlace into an item socket of the right colour to gain this skill. Right click to remove from a socket.-like meteor skill
Vengeful Soul	Normal/Magic	Spawns projectile mortar on death
Vengeful Stalker	Normal/Magic
Wasting Touch	Normal/Magic	Wasting Touch debuff on hit
Winter Whorl	Normal/Magic	Periodically, apparition casts orbiting cold projectiles
Bolt Cross	Rare/Unique	Periodically, apparition casts a lightning storm that expands in a cross pattern
Burrowing Blade	Rare/Unique
Conflagrating Path	Rare/Unique
Crushing Leap	Rare/Unique	Periodically, apparition that uses Leap SlamLeap SlamAttack, AoE, Movement, Travel, Slam, Melee Level: (1-20) Cost: (6-10) Mana Attack Damage: (136-314)% of base Effectiveness of Added Damage: (136-314)% AoE Radius: 15Requires Level 10Jump through the air, damaging and knocking back enemies with your weapon where you land. Enemies you would land on are pushed out of the way. Requires an Axe, Mace, Sceptre, Sword or Staff.(20-39)% increased Stun Duration against Enemies that are on Full Life +0.55 seconds to Attack Time Base radius is 1.5 metres Damaging Hits always Stun Enemies that are on Full Life Additional Effects From 1-20% Quality: (2-40)% increased Stun Duration against Enemies that are on Full LifePlace into an item socket of the right colour to gain this skill. Right click to remove from a socket.
Frozen Flume	Rare/Unique	Periodically, apparition casts a cold damage AoE line
Glaciator	Rare/Unique	Periodically, apparition throws a spear which explodes creating frozen ground, applies cold damage over time
Icicle Wreath	Rare/Unique	Periodically, apparition fires a nova of ice projectiles
Jagged Swell	Rare/Unique
Ring of Fire	Rare/Unique
Scatter Storm	Rare/Unique	Periodically, apparition fires a large quantity of lightning projectiles that apply sap
Scorched Earth	Rare/Unique
Shockbomb	Rare/Unique	Periodically, apparition casts a lightning explosion skill

Related items

Item		Stats
Abyssal Delirium OrbAbyssal Delirium OrbStack Size: 10Modifies a Map item adding layers of Delirium with the Abyss Items reward typeRight click this item then left click a Map item to apply it. Can apply up to 5 to a single Map item.	1	—
Armoursmith's Delirium OrbArmoursmith's Delirium OrbStack Size: 10Modifies a Map item adding layers of Delirium with the Armour reward typeRight click this item then left click a Map item to apply it. Can apply up to 5 to a single Map item.	1	—
Blacksmith's Delirium OrbBlacksmith's Delirium OrbStack Size: 10Modifies a Map item adding layers of Delirium with the Weapons reward typeRight click this item then left click a Map item to apply it. Can apply up to 5 to a single Map item.	1	—
Blighted Delirium OrbBlighted Delirium OrbStack Size: 10Modifies a Map item adding layers of Delirium with the Blight reward typeRight click this item then left click a Map item to apply it. Can apply up to 5 to a single Map item.	1	—
Cartographer's Delirium OrbCartographer's Delirium OrbStack Size: 10Modifies a Map item adding layers of Delirium with the Map Items reward typeRight click this item then left click a Map item to apply it. Can apply up to 5 to a single Map item.	1	—
Delirium ScarabDelirium ScarabStack Size: 20 Limit: 1Area contains a Mirror of DeliriumA perfectly innocuous Scarab that does nothing at all.Can be used in a personal Map Device to add modifiers to a Map.	1	—
Delirium Scarab of DelusionsDelirium Scarab of DelusionsStack Size: 20 Limit: 1Maps found in Area have layers of DeliriumWhat are you talking about? The Atlas was always like this.Can be used in a personal Map Device to add modifiers to a Map.	1	—
Delirium Scarab of ManiaDelirium Scarab of ManiaStack Size: 20 Limit: 2Delirium Reward Meters fill 100% faster in Area Delirium in Area increases 50% faster with distance from the mirrorThey're so loud! Why are they so loud?! All you can do is scream!Can be used in a personal Map Device to add modifiers to a Map.	1	—
Delirium Scarab of NeurosesDelirium Scarab of NeurosesStack Size: 20 Limit: 1Delirium Encounters in Area contain all Unique Delirium Bosses Can only be used with Tier 11+ MapsToothy grins shine in the dark.Can be used in a personal Map Device to add modifiers to a Map.	1	—
Delirium Scarab of ParanoiaDelirium Scarab of ParanoiaStack Size: 20 Limit: 5Delirium Encounters in Area generate 2 additional Reward typesIf it seems too good to be true...Can be used in a personal Map Device to add modifiers to a Map.	1	—
Diviner's Delirium OrbDiviner's Delirium OrbStack Size: 10Modifies a Map item adding layers of Delirium with the Divination Cards reward typeRight click this item then left click a Map item to apply it. Can apply up to 5 to a single Map item.	1	—
Fine Delirium OrbFine Delirium OrbStack Size: 10Modifies a Map item adding layers of Delirium with the Currency Items reward typeRight click this item then left click a Map item to apply it. Can apply up to 5 to a single Map item. Shift click to unstack.	1	—
Foreboding Delirium OrbForeboding Delirium OrbStack Size: 10Modifies a Map item adding layers of Delirium with the Harbinger Items reward typeRight click this item then left click a Map item to apply it. Can apply up to 5 to a single Map item.	1	—
Fossilised Delirium OrbFossilised Delirium OrbStack Size: 10Modifies a Map item adding layers of Delirium with the Fossils reward typeRight click this item then left click a Map item to apply it. Can apply up to 5 to a single Map item.	1	—
Fragmented Delirium OrbFragmented Delirium OrbStack Size: 10Modifies a Map item adding layers of Delirium with the Fragments reward typeRight click this item then left click a Map item to apply it. Can apply up to 5 to a single Map item.	1	—
Jeweller's Delirium OrbJeweller's Delirium OrbStack Size: 10Modifies a Map item adding layers of Delirium with the Trinkets reward typeRight click this item then left click a Map item to apply it. Can apply up to 5 to a single Map item.	1	—
Obscured Delirium OrbObscured Delirium OrbStack Size: 10Modifies a Map item adding layers of Delirium with the Breach Items reward typeRight click this item then left click a Map item to apply it. Can apply up to 5 to a single Map item.	1	—
SimulacrumSimulacrumHow do you defeat that which dwells within you?Open a Delirium portal by using this item in a personal Map Device. Can only be used once.	1	—
Singular Delirium OrbSingular Delirium OrbStack Size: 10Modifies a Map item adding layers of Delirium with the Unique Items reward typeRight click this item then left click a Map item to apply it. Can apply up to 5 to a single Map item.	1	—
Skittering Delirium OrbSkittering Delirium OrbStack Size: 10Modifies a Map item adding layers of Delirium with the Scarabs reward typeRight click this item then left click a Map item to apply it. Can apply up to 5 to a single Map item.	1	—
Thaumaturge's Delirium OrbThaumaturge's Delirium OrbStack Size: 10Modifies a Map item adding layers of Delirium with the Gems reward typeRight click this item then left click a Map item to apply it. Can apply up to 5 to a single Map item.	1	—
Timeless Delirium OrbTimeless Delirium OrbStack Size: 10Modifies a Map item adding layers of Delirium with the Legion reward typeRight click this item then left click a Map item to apply it. Can apply up to 5 to a single Map item.	1	—
Whispering Delirium OrbWhispering Delirium OrbStack Size: 10Modifies a Map item adding layers of Delirium with the Essences reward typeRight click this item then left click a Map item to apply it. Can apply up to 5 to a single Map item.	1	—

Related Atlas passive skills

Name	Stats
Additional Delirium Reward Chance	Delirium Encounters in your Maps have 4% chance to generate an additional Reward type [1] [2] [3]
Cluster Jewel Chance	Delirium Monsters in your Maps have 10% increased chance to drop Cluster Jewels [1] [2]
Delirious Map Chance	Maps found in your Maps have 1% chance to have layers of Delirium [1]
Delirium Additional Splinters	6% increased Stack size of Simulacrum Splinters found in your Maps [1] [2]
Delirium Boss Chance	Delirium Encounters in your Maps are 16% more likely to spawn Unique Bosses [1] [2] [3]
Delirium Boss Chance and Additional Delirium Reward Chance	Delirium Encounters in your Maps have 2% chance to generate an additional Reward type Delirium Encounters in your Maps are 8% more likely to spawn Unique Bosses [1]
Delirium Chance	Your Maps have +4% chance to contain a Mirror of Delirium [1] [2] [3] [4] [5] Your Maps have +8% chance to contain a Mirror of Delirium [6] [7] [8] [9] [10] Your Maps have +12% chance to contain a Mirror of Delirium [7] [8] [9]
Delirium Difficulty	Delirium in your Maps increases 10% faster with distance from the mirror [1] [2]
Delirium Fog Dissipation Delay	Delirium Fog in your Maps lasts 3 additional seconds before dissipating [1] [2]
Delirium Orb Reward Chance	Delirium Rewards in your Maps have 10% increased chance to give Delirium Orbs [1] [2]
Delirium Orb Reward Chance and Cluster Jewel Chance	Delirium Monsters in your Maps have 5% increased chance to drop Cluster Jewels Delirium Rewards in your Maps have 5% increased chance to give Delirium Orbs [1]
Delirium Persistence	Delirium Fog in your Maps dissipates 8% slower [1] [2]
Delirium Reward Progress	Delirious Monsters Killed in your Maps provide 10% increased Reward Progress [1] [2]
Delirium Reward Progress and Additional Splinters	3% increased Stack size of Simulacrum Splinters found in your Maps Delirious Monsters Killed in your Maps provide 5% increased Reward Progress [1]
Unending Nightmare	Delirium Fog in your Maps never dissipates Delirium in your Maps has doubled difficulty scaling with distance from the mirror Simulacrum Splinters cannot be found in your Maps Delirium Orbs cannot be found in your Maps [1]
Compulsive Hoarder	Delirium Encounters in your Maps have 8% chance to generate three additional Reward types [1]
Delusions of Persecution	Delirium Encounters in your Maps are 100% more likely to spawn Unique Bosses Delirium Bosses in your Maps drop 50% increased Simulacrum Splinters Delirium Bosses in your Maps have 50% increased chance to drop Unique Cluster Jewels [1]
Descent Into Madness	Delirium in your Maps increases 50% faster with distance from the mirror [1]
Imagined Pursuits	Delirium Reward Types in your Maps gain +1 to count on Map Completion [1]
Paranoid Fixation	Delirious Unique Monsters in your Maps have a 1% chance to drop an additional Delirium Orb Delirious Unique Monsters in your Maps have a 2% chance to drop an additional Cluster Jewel [1]
Pathological	Maps found in your Maps have 3% chance to have layers of Delirium [1]
Screaming Whispers	18% increased Stack size of Simulacrum Splinters found in your Maps [1]
That Which You Seek	Your Maps have +24% chance to contain a Mirror of Delirium [1]
The Singular Eternity	Delirium Fog in your Maps dissipates 25% slower Delirium Fog in your Maps lasts 10 additional seconds before dissipating [1]

Related scarabs

Item	Limit	Description
Delirium ScarabDelirium ScarabStack Size: 20 Limit: 1Area contains a Mirror of DeliriumA perfectly innocuous Scarab that does nothing at all.Can be used in a personal Map Device to add modifiers to a Map.	1	Area contains a Mirror of Delirium
Delirium Scarab of DelusionsDelirium Scarab of DelusionsStack Size: 20 Limit: 1Maps found in Area have layers of DeliriumWhat are you talking about? The Atlas was always like this.Can be used in a personal Map Device to add modifiers to a Map.	1	Maps found in Area have layers of Delirium
Delirium Scarab of ManiaDelirium Scarab of ManiaStack Size: 20 Limit: 2Delirium Reward Meters fill 100% faster in Area Delirium in Area increases 50% faster with distance from the mirrorThey're so loud! Why are they so loud?! All you can do is scream!Can be used in a personal Map Device to add modifiers to a Map.	2	Delirium Reward Meters fill 100% faster in Area Delirium in Area increases 50% faster with distance from the mirror
Delirium Scarab of NeurosesDelirium Scarab of NeurosesStack Size: 20 Limit: 1Delirium Encounters in Area contain all Unique Delirium Bosses Can only be used with Tier 11+ MapsToothy grins shine in the dark.Can be used in a personal Map Device to add modifiers to a Map.	1	Delirium Encounters in Area contain all Unique Delirium Bosses Can only be used with Tier 11+ Maps
Delirium Scarab of ParanoiaDelirium Scarab of ParanoiaStack Size: 20 Limit: 5Delirium Encounters in Area generate 2 additional Reward typesIf it seems too good to be true...Can be used in a personal Map Device to add modifiers to a Map.	5	Delirium Encounters in Area generate 2 additional Reward types

Version history

Version	Changes
3.24.2	Elder Guardians can no longer be targeted by Delirium Demons, as they could fail to transition phases if they were under the effects of Delirium when the Delirium encounter ended.
3.23.0	Catalysts are no longer offered as Ritual Rewards, or a reward type for Delirium Rewards. Metamorph rewards from Heist, Expedition, Betrayal, Delirium, Legion and Eldritch Altars have been replaced with Ultimatum rewards. When Delirium fog has ceased its movement due to players engaging in other League content, walking out of the fog will no longer cause the Delirium fog to dissipate.
3.20.0	Delirium mist now pauses for ten seconds when you first interact with the Sanctum Map in an area. We want to improve on the concept that the Atlas Tree allows players to invest into leagues that they enjoy, and have added new clusters to the passive tree for league content that can be blocked through Atlas Passive Skills. We've also increased the chances for such league content to appear.
3.18.0	The chance for Map Areas to contain a Mirror of Delirium no longer increases by a small amount for each other league, atlas or master mechanic that appears in that area. Instead, Map Areas now have an 8% chance to contain a Mirror of Delirium, with campaign areas from the Torched Courts onwards having a slightly higher chance.
3.14.0	Reduced the chance for Map Areas to contain a Delirium Mirror by approximately 20%. The chance to encounter a Zana mission containing a Delirium encounter has also been lowered by the same amount. The Quantity and Rarity bonus applied to monsters from Delirium encounters has been lowered as is now more consistent across Monster rarities. Previously, Monsters of Normal rarity had a disproportionately larger amount of Quantity and Rarity being applied to them compared to Monsters of higher rarities.
3.11.0	Delirium has been added to the core game. From the Torched Courts onwards, you'll have approximately a 5% chance to encounter a Mirror of Delirium in each area. Once you reach the Atlas, that chance will increase by a small amount for each other league, atlas or master mechanic that appears in that area. In other words, if your goal is to encounter Mirrors of Delirium then you are encouraged to use your Zana modifiers, master missions, sextants, and whatever else you have available to you. You'll now have a greater chance of finding Cluster Jewels through Delirium encounters, proportional to the number of rewards you earn during that encounter.
3.10.1c	Active Legion encounters now cause Delirium mist to pause its movement during both the Frozen phase and the Combat phase (previously was just the Frozen phase). Active Blight encounters now cause Delirium mist to pause its movement while you are within a large radius of Blight Portals, rather than the Ichor Pump. This is because Blight Portals can sometimes spawn very far away!
3.10.0e	Delirium mist now stops moving while all players in the area are engaged in a Blight Encounter, Betrayal Research encounter, Legion Encounter, Breach or Incursion. Activating or completing several time-consuming gameplay elements causes the Delirium mist to stop moving for a set amount of time based on the encounter type. The following conditions cause the Delirium mist to stop moving: an Abyss crack reaching its next location, defeating a Harbinger, defeating a Metamorph, defeating a Red Bestiary beast, defeating an Essence Rare monster, opening a Perandus chest, opening a Strongbox, completing a Blight encounter, completing a Legion encounter and defeating a Betrayal target. When you fulfill the requirements for a reward for the third time in a Delirium encounter, an additional reward type is now added and its requirements automatically fulfilled for the first reward. The new reward is fulfilled in tandem with the initial reward. In addition, when you fulfill the requirements for the initial reward a fifth time, a second reward type is added (again with the requirements automatically fulfilled for the first reward). These rewards are chosen at the exclusion of each other. Reduced the likelihood of receiving Generic, Weapon, Armour and Trinket reward types. Delirium mist now stops moving when no players are in the instance. This should allow players to leave an area to vendor and trade items during a Delirium encounter more freely.
3.10.0d	Delirium modifiers are now applied on a per-pack basis. This means that a given pack of monsters will only have a single Delirium modifier, rather than potentially having a variety of different modifiers. Reduced the difficulty of Delirium monsters at each mist depth. Significantly reduced the chance of Delirium modifiers appearing on monsters.
3.10.0	Introduced to the game.

References

↑ Nickoladze (Oct 25, 2021). "Delirium in campaign". Reddit.
↑ ^2.0 ^2.1 ^2.2 ^2.3 ^2.4 blvcksvn (June 5, 2023). "Update on Delirium damage reduction %". Path of Exile Subreddit. Retrieved June 5, 2023.
↑ https://www.pathofexile.com/forum/view-thread/2791689
↑ https://www.reddit.com/r/pathofexile/comments/z3m44q/psa_debunking_the_plague_bearer_delirium_myth/
↑ ^5.0 ^5.1 ^5.2 Community_Team (Apr 12, 2021). "Game Balance in Path of Exile: Ultimatum". Path of Exile Forum. Retrieved January 25, 2023.
↑ poorFishwife (February 5, 2023). "Deli Quant Theory". Prohibited Library ^{(requires membership to view)}. Retrieved March 7, 2023.

[1] Nickoladze (Oct 25, 2021). "Delirium in campaign". Reddit.

[Prohibited_Library_Damage_Reduction-2] 2.0 ^2.1 ^2.2 ^2.3 ^2.4 blvcksvn (June 5, 2023). "Update on Delirium damage reduction %". Path of Exile Subreddit. Retrieved June 5, 2023.

[3] ttps://www.pathofexile.com/forum/view-thread/2791689

[4] ttps://www.reddit.com/r/pathofexile/comments/z3m44q/psa_debunking_the_plague_bearer_delirium_myth/

[LootMultiplier-5] 5.0 ^5.1 ^5.2 Community_Team (Apr 12, 2021). "Game Balance in Path of Exile: Ultimatum". Path of Exile Forum. Retrieved January 25, 2023.

[Prohibited_Library_Strongbox-6] rFishwife (February 5, 2023). "Deli Quant Theory". Prohibited Library ^{(requires membership to view)}. Retrieved March 7, 2023.

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v t e Delirium

Mechanics	Delirium Strange Voice Cluster Jewel SimulacrumSimulacrumHow do you defeat that which dwells within you?Open a Delirium portal by using this item in a personal Map Device. Can only be used once. Simulacrum SplinterSimulacrum SplinterStack Size: 300Combine 300 Splinters to create a Simulacrum. List of delirium modifiers

Bosses	Kosis, The Revelation Omniphobia, Fear Manifest

Cluster Jewel bases	Small Cluster JewelSmall Cluster JewelPlace into an allocated Small, Medium or Large Jewel Socket on the Passive Skill Tree. Added passives do not interact with jewel radiuses. Right click to remove from the Socket. Medium Cluster JewelMedium Cluster JewelPlace into an allocated Medium or Large Jewel Socket on the Passive Skill Tree. Added passives do not interact with jewel radiuses. Right click to remove from the Socket. Large Cluster JewelLarge Cluster JewelPlace into an allocated Large Jewel Socket on the Passive Skill Tree. Added passives do not interact with jewel radiuses. Right click to remove from the Socket.

Unique Cluster Jewels	MegalomaniacMegalomaniac Medium Cluster JewelAdds 4 Passive Skills Added Small Passive Skills grant Nothing <3 Random notable mods>CorruptedIf you're going to act like you're better than everyone else, make sure you are.Place into an allocated Medium or Large Jewel Socket on the Passive Skill Tree. Added passives do not interact with jewel radiuses. Right click to remove from the Socket. VoicesVoices Large Cluster JewelAdds 3 Jewel Socket Passive Skills <Random empty passive skill node mod>CorruptedOnly a madman would ignore a god's instructions.Place into an allocated Large Jewel Socket on the Passive Skill Tree. Added passives do not interact with jewel radiuses. Right click to remove from the Socket. Calamitous VisionsCalamitous Visions Small Cluster JewelAdds Lone Messenger"Try as I might, I could not escape it. When I closed my eyes, I saw only death. Each breath tainted with the scent of seared and smouldering flesh, And each sound tangled with pleas for mercy."Place into an allocated Small, Medium or Large Jewel Socket on the Passive Skill Tree. Added passives do not interact with jewel radiuses. Right click to remove from the Socket. Kitava's TeachingsKitava's Teachings Small Cluster JewelAdds Disciple of KitavaSavour the bitter, cherish the sweet, For there may never be another chance to eat.Place into an allocated Small, Medium or Large Jewel Socket on the Passive Skill Tree. Added passives do not interact with jewel radiuses. Right click to remove from the Socket. Natural AffinityNatural Affinity Small Cluster JewelAdds Nature's PatienceYou can take the girl out of the woods, but you can't take the woods out of the girl.Place into an allocated Small, Medium or Large Jewel Socket on the Passive Skill Tree. Added passives do not interact with jewel radiuses. Right click to remove from the Socket. One With NothingOne With Nothing Small Cluster JewelAdds Hollow Palm TechniqueOnce you begin to rely on your weapons, You ensure you can't live without them.Place into an allocated Small, Medium or Large Jewel Socket on the Passive Skill Tree. Added passives do not interact with jewel radiuses. Right click to remove from the Socket. The Front LineThe Front Line Small Cluster JewelAdds Veteran's AwarenessIt was a great honour to fight at the front. The few that survived the initial charge were guaranteed fame and fortune.Place into an allocated Small, Medium or Large Jewel Socket on the Passive Skill Tree. Added passives do not interact with jewel radiuses. Right click to remove from the Socket. The InterrogationThe Interrogation Small Cluster JewelAdds Secrets of SufferingPain is a fine motivator, But if you seek the truth, Fear of pain unknown has no parallel.Place into an allocated Small, Medium or Large Jewel Socket on the Passive Skill Tree. Added passives do not interact with jewel radiuses. Right click to remove from the Socket. The SiegeThe Siege Small Cluster JewelAdds KineticismAs the dead battered Highgate's barricades, The Black Sekhema accepted her fate, And stood her ground.Place into an allocated Small, Medium or Large Jewel Socket on the Passive Skill Tree. Added passives do not interact with jewel radiuses. Right click to remove from the Socket.

Uniques	Split PersonalitySplit Personality Crimson JewelLimited to: 2This Jewel's Socket has 25% increased effect per Allocated Passive Skill between it and your Class' starting location <Two random modifiers>CorruptedYou need not go looking for a second opinion.Place into an allocated Jewel Socket on the Passive Skill Tree. Right click to remove from the Socket.

Delirium Orbs	Core game: Abyssal Delirium OrbAbyssal Delirium OrbStack Size: 10Modifies a Map item adding layers of Delirium with the Abyss Items reward typeRight click this item then left click a Map item to apply it. Can apply up to 5 to a single Map item. Armoursmith's Delirium OrbArmoursmith's Delirium OrbStack Size: 10Modifies a Map item adding layers of Delirium with the Armour reward typeRight click this item then left click a Map item to apply it. Can apply up to 5 to a single Map item. Blacksmith's Delirium OrbBlacksmith's Delirium OrbStack Size: 10Modifies a Map item adding layers of Delirium with the Weapons reward typeRight click this item then left click a Map item to apply it. Can apply up to 5 to a single Map item. Blighted Delirium OrbBlighted Delirium OrbStack Size: 10Modifies a Map item adding layers of Delirium with the Blight reward typeRight click this item then left click a Map item to apply it. Can apply up to 5 to a single Map item. Cartographer's Delirium OrbCartographer's Delirium OrbStack Size: 10Modifies a Map item adding layers of Delirium with the Map Items reward typeRight click this item then left click a Map item to apply it. Can apply up to 5 to a single Map item. Diviner's Delirium OrbDiviner's Delirium OrbStack Size: 10Modifies a Map item adding layers of Delirium with the Divination Cards reward typeRight click this item then left click a Map item to apply it. Can apply up to 5 to a single Map item. Fine Delirium OrbFine Delirium OrbStack Size: 10Modifies a Map item adding layers of Delirium with the Currency Items reward typeRight click this item then left click a Map item to apply it. Can apply up to 5 to a single Map item. Shift click to unstack. Foreboding Delirium OrbForeboding Delirium OrbStack Size: 10Modifies a Map item adding layers of Delirium with the Harbinger Items reward typeRight click this item then left click a Map item to apply it. Can apply up to 5 to a single Map item. Fossilised Delirium OrbFossilised Delirium OrbStack Size: 10Modifies a Map item adding layers of Delirium with the Fossils reward typeRight click this item then left click a Map item to apply it. Can apply up to 5 to a single Map item. Fragmented Delirium OrbFragmented Delirium OrbStack Size: 10Modifies a Map item adding layers of Delirium with the Fragments reward typeRight click this item then left click a Map item to apply it. Can apply up to 5 to a single Map item. Jeweller's Delirium OrbJeweller's Delirium OrbStack Size: 10Modifies a Map item adding layers of Delirium with the Trinkets reward typeRight click this item then left click a Map item to apply it. Can apply up to 5 to a single Map item. Obscured Delirium OrbObscured Delirium OrbStack Size: 10Modifies a Map item adding layers of Delirium with the Breach Items reward typeRight click this item then left click a Map item to apply it. Can apply up to 5 to a single Map item. Singular Delirium OrbSingular Delirium OrbStack Size: 10Modifies a Map item adding layers of Delirium with the Unique Items reward typeRight click this item then left click a Map item to apply it. Can apply up to 5 to a single Map item. Skittering Delirium OrbSkittering Delirium OrbStack Size: 10Modifies a Map item adding layers of Delirium with the Scarabs reward typeRight click this item then left click a Map item to apply it. Can apply up to 5 to a single Map item. Thaumaturge's Delirium OrbThaumaturge's Delirium OrbStack Size: 10Modifies a Map item adding layers of Delirium with the Gems reward typeRight click this item then left click a Map item to apply it. Can apply up to 5 to a single Map item. Timeless Delirium OrbTimeless Delirium OrbStack Size: 10Modifies a Map item adding layers of Delirium with the Legion reward typeRight click this item then left click a Map item to apply it. Can apply up to 5 to a single Map item. Whispering Delirium OrbWhispering Delirium OrbStack Size: 10Modifies a Map item adding layers of Delirium with the Essences reward typeRight click this item then left click a Map item to apply it. Can apply up to 5 to a single Map item. Ruthless mode: Delirium OrbDelirium OrbStack Size: 10Modifies a Map item adding layers of Delirium with the Generic Item reward typeRight click this item then left click a Map item to apply it. Can apply up to 5 to a single Map item. Shift click to unstack.

Scarabs	Delirium ScarabDelirium ScarabStack Size: 20 Limit: 1Area contains a Mirror of DeliriumA perfectly innocuous Scarab that does nothing at all.Can be used in a personal Map Device to add modifiers to a Map. Delirium Scarab of ManiaDelirium Scarab of ManiaStack Size: 20 Limit: 2Delirium Reward Meters fill 100% faster in Area Delirium in Area increases 50% faster with distance from the mirrorThey're so loud! Why are they so loud?! All you can do is scream!Can be used in a personal Map Device to add modifiers to a Map. Delirium Scarab of ParanoiaDelirium Scarab of ParanoiaStack Size: 20 Limit: 5Delirium Encounters in Area generate 2 additional Reward typesIf it seems too good to be true...Can be used in a personal Map Device to add modifiers to a Map. Delirium Scarab of NeurosesDelirium Scarab of NeurosesStack Size: 20 Limit: 1Delirium Encounters in Area contain all Unique Delirium Bosses Can only be used with Tier 11+ MapsToothy grins shine in the dark.Can be used in a personal Map Device to add modifiers to a Map. Delirium Scarab of DelusionsDelirium Scarab of DelusionsStack Size: 20 Limit: 1Maps found in Area have layers of DeliriumWhat are you talking about? The Atlas was always like this.Can be used in a personal Map Device to add modifiers to a Map.