Contagion

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ContagionContagion of SubsidingContagion of Transference
ContagionSpell, AoE, Duration, Chaos
Level: (1-20)
Cost: (5-20) Mana
Cast Time: 0.60 sec
AoE Radius: 20
Requires Level 4Unleashes a vile contagion on enemies, dealing chaos damage over time. If an enemy dies while affected by Contagion, the debuff spreads to other enemies.Deals (3.5-235.9) Base Chaos Damage per second
Base duration is 5.00 seconds
Modifiers to Spell Damage apply to this Skill's Damage Over Time effect
Base radius is 1.7 metres
Spreads when affected Enemy dies

Additional Effects From 1-20% Quality:
Base radius is (0.01-0.2) metres
Place into an item socket of the right colour to gain this skill. Right click to remove from a socket.
Acquisition
Drop level: 5
Vendor Offer
1x Scroll Fragment
Metadata
Item class: Skill Gem
Metadata ID: Metadata/Items/Gems/SkillGemContagion


Contagion is a chaos spell that applies a chaos damage over time effect to all enemies in the area, and spreads itself when an enemy dies. Contagion interacts favourably with Essence DrainEssence DrainSpell, Projectile, Duration, Chaos, AoE
Level: (1-20)
Cost: (8-23) Mana
Cast Time: 0.70 sec
Critical Strike Chance: 5.00%
Effectiveness of Added Damage: 140%
Requires Level 12Fires a projectile that applies a damage over time debuff when it hits. You are healed for a portion of the debuff damage. The debuff is spread by Contagion.Deals (9-644) to (13-966) Chaos Damage
Deals (31.2-1509.4) Base Chaos Damage per second
Base duration is 3.80 seconds
Modifiers to Spell Damage apply to this Skill's Damage Over Time effect
Regenerate 0.50% of Debuff Damage as Life

Additional Effects From 1-20% Quality:
Regenerate +(0.025-0.5)% of Debuff Damage as Life
Place into an item socket of the right colour to gain this skill. Right click to remove from a socket.
, a skill that deals heavy chaos damage over time and is spread by Contagion.

Skill functions and interactions

  • Modifiers to Spell Damage apply to this skill's Damage Over Time Effect: Modifiers to spell damage only affect the damage over time effect of Contagion granted by the gem and do not affect other sources of damage over time caused by the skill.
  • Essence DrainEssence DrainSpell, Projectile, Duration, Chaos, AoE
    Level: (1-20)
    Cost: (8-23) Mana
    Cast Time: 0.70 sec
    Critical Strike Chance: 5.00%
    Effectiveness of Added Damage: 140%
    Requires Level 12Fires a projectile that applies a damage over time debuff when it hits. You are healed for a portion of the debuff damage. The debuff is spread by Contagion.Deals (9-644) to (13-966) Chaos Damage
    Deals (31.2-1509.4) Base Chaos Damage per second
    Base duration is 3.80 seconds
    Modifiers to Spell Damage apply to this Skill's Damage Over Time effect
    Regenerate 0.50% of Debuff Damage as Life

    Additional Effects From 1-20% Quality:
    Regenerate +(0.025-0.5)% of Debuff Damage as Life
    Place into an item socket of the right colour to gain this skill. Right click to remove from a socket.
    : When an enemy affected by both Contagion and Essence Drain dies, the resulting Contagion proc will spread both effects. Contagion will not spread other damage over time effects.
    • This also applies to Blight of ContagionBlight of ContagionSpell, Chaos, AoE, Channelling, Duration
      Level: (1-20)
      Cost: (2-5) Mana
      Cast Time: 0.25 sec
      Apply a debuff to enemies in front of you which deals chaos damage over time. Enemies who aren't already debuffed by Blight are also hindered for a shorter secondary duration, slowing their movement. Continued channelling adds layers of damage to the debuff, each with their own duration. The damaging debuff is spread by Contagion.Deals (8.5-612.1) Base Chaos Damage per second
      Base duration is 4.00 seconds
      Base secondary duration is 1.00 seconds
      Modifiers to Spell Damage apply to this Skill's Damage Over Time effect
      +(0-0.6) metres to radius
      80% reduced Movement Speed
      Debuff can have up to 5 layers of Damage

      Additional Effects From 1-20% Quality:
      Base duration is (0.05-1) seconds
      Place into an item socket of the right colour to gain this skill. Right click to remove from a socket.
      and Essence Drain of DesperationEssence Drain of DesperationSpell, Projectile, Duration, Chaos, AoE
      Level: (1-20)
      Cost: (8-23) Mana
      Cast Time: 0.70 sec
      Critical Strike Chance: 5.00%
      Effectiveness of Added Damage: 140%
      Requires Level 12Fires a projectile that applies a damage over time debuff when it hits. You lose Life and Energy Shield equal to a portion of the debuff damage. The debuff is spread by Contagion.Deals (9-644) to (13-966) Chaos Damage
      Deals (45.2-2191.4) Base Chaos Damage per second
      Base duration is 3.80 seconds
      Modifiers to Spell Damage apply to this Skill's Damage Over Time effect
      Lose Life and Energy Shield equal to 0.2% of Debuff Damage

      Additional Effects From 1-20% Quality:
      Base duration is (0.02-0.4) seconds
      Place into an item socket of the right colour to gain this skill. Right click to remove from a socket.
      .
  • Duration: Increases and reductions to duration function normally. The duration of Contagion and associated degeneration effects (Essence DrainEssence DrainSpell, Projectile, Duration, Chaos, AoE
    Level: (1-20)
    Cost: (8-23) Mana
    Cast Time: 0.70 sec
    Critical Strike Chance: 5.00%
    Effectiveness of Added Damage: 140%
    Requires Level 12Fires a projectile that applies a damage over time debuff when it hits. You are healed for a portion of the debuff damage. The debuff is spread by Contagion.Deals (9-644) to (13-966) Chaos Damage
    Deals (31.2-1509.4) Base Chaos Damage per second
    Base duration is 3.80 seconds
    Modifiers to Spell Damage apply to this Skill's Damage Over Time effect
    Regenerate 0.50% of Debuff Damage as Life

    Additional Effects From 1-20% Quality:
    Regenerate +(0.025-0.5)% of Debuff Damage as Life
    Place into an item socket of the right colour to gain this skill. Right click to remove from a socket.
    ) is not reset when spread to other enemies on death.
  • Area of Effect: Modifiers to area of effect affect both the skill radius and spread radius of Contagion.[1] Modifiers to area damage (such as Concentrated Effect SupportConcentrated Effect SupportSupport, AoE
    Icon: o
    Level: (1-20)
    Cost & Reservation Multiplier: 140%
    Requires Level 18Supports any skill with an area of effect, regardless of whether that skill deals damage.Supported Skills deal (25-39)% more Area Damage
    Supported Skills have 30% less Area of Effect

    Additional Effects From 1-20% Quality:
    Supported Skills deal (0.5-10)% increased Area Damage
    This is a Support Gem. It does not grant a bonus to your character, but to skills in sockets connected to it. Place into an item socket connected to a socket containing the Skill Gem you wish to augment. Right click to remove from a socket.
    ) do not apply.[2]
  • On hit effects: Contagion does not hit, and therefore cannot activate the effects of supports such as Hextouch SupportHextouch SupportSupport, Hex, Trigger
    Icon: &
    Level: (1-20)
    Cost & Reservation Multiplier: 130%
    Requires Level 38Must support both a skill that hits enemies, and a hex curse skill to work. The hex will be applied when enemies are hit by the other skill. Cannot support totems, traps, or mines. Minions cannot apply hexes this way.Supported Skills apply supported Curses on Hit
    You cannot Cast Supported Curse Spells
    35% less Effect of Supported Curses
    Supported Skills have (50-31)% reduced Curse Duration

    Additional Effects From 1-20% Quality:
    Supported Skills have (0.5-10)% increased Curse Duration
    This is a Support Gem. It does not grant a bonus to your character, but to skills in sockets connected to it. Place into an item socket connected to a socket containing the Skill Gem you wish to augment. Right click to remove from a socket.
    .

Gem level progression

LevelRequired LevelRequired DexterityRequired IntelligenceMana
Cost
Chaos
Damage
per sec
Exp.Total Exp.
140053.500
260064.3841841
3901765.730993940
412142177.4743311373
5161826810.22289534268
6202231913.64972583993
7242537101895714179707
82829421123.3169595349302
93233471129.9283759633061
103636521238.14539961087057
114040581348.17031281790185
124444631460.310612232851408
134848681575.220658704917278
145251741693.325071107424388
1555547816109.525737319998119
1658578217128.1761135117609470
1761608618149.61343790831047378
1864629018174.42505214756099525
19676594192034386943699968961
2070689820235.9242081178342050139
21727010020260.5N/AN/A
2274N/AN/A21287.5N/AN/A
2376N/AN/A21317.2N/AN/A
2478N/AN/A21349.7N/AN/A
2580N/AN/A22385.4N/AN/A
2682N/AN/A22424.5N/AN/A
2784N/AN/A23467.3N/AN/A
2886N/AN/A23514.3N/AN/A
2988N/AN/A24565.7N/AN/A
3090N/AN/A24621.9N/AN/A
3191N/AN/A24652N/AN/A
3292N/AN/A25683.5N/AN/A
3393N/AN/A25716.5N/AN/A
3494N/AN/A25750.9N/AN/A
3595N/AN/A25787N/AN/A
3696N/AN/A25824.7N/AN/A
3797N/AN/A26864.1N/AN/A
3898N/AN/A26905.4N/AN/A
3999N/AN/A26948.5N/AN/A
40100N/AN/A26993.6N/AN/A

Gem quality

TypeAdditional Effects per 1-20% QualityWeight
SuperiorBase radius is (0.01-0.2) metres1

Item acquisition

Contagion can drop anywhere.

Recipes

Contagion can be created from the following recipes:

AmountPartDescriptionMeta
3The Bitter BlossomThe Bitter Blossom3Level 21 Chaos Gem
Quality: +23%
Corrupted
The pain you feel is of no consequence, it is evolution, to be made whole within something greater.
Random corrupted level 21 Chaos gem with 23% qualityA
13The CataclysmThe Cataclysm13Level 21 Spell Gem
Corrupted
The mighty warriors traded in blows, the nimble archers in arrows, yet it was the brazen thaumaturgists who would bring catastrophe to all.
Random corrupted level 21 Spell gemA
6The FoxThe Fox6Level 20 Gem"Masters of wit, strength and cunning. To survive the harsh winters, you must be like the fox."
- Ezomyte Proverb
Random level 20 gemA
3Gemcutter's PromiseGemcutter's Promise3Gem
Quality: +20%
"I swore to use my position to help the people. What good is power when it just accumulates on the already-powerful?" - Erasmus, Imperial Gemcutter
Random gem with 20% qualityA
1Gemcutter's IncubatorGemcutter's IncubatorStack Size: 10Adds an incubated Quality Gem item to an equippable item
Item drops after killing {0} monsters
Right click this item then left click an item to apply it. The Incubated item drops after killing a specific number of monsters.
Random gem with 1–20% qualityA
1The VoidThe Void1Reach into the Void and claim your prize.Random divination card set exchangeA

Quest reward

This item is given as a quest reward for the following quests:

Class →WitchShadowRangerDuelistMarauderTemplarScion
Quest ↓
Breaking Some Eggs
Act 1

Vendor reward

This item can be bought at the listed NPC vendors, after completing the following quests:

Class →WitchShadowRangerDuelistMarauderTemplarScion
Quest ↓
Breaking Some Eggs
Act 1
Nessa
A Fixture of Fate
Act 3
Siosa
Fallen from Grace
Act 6
Lilly Roth

Related helmet enchantments

The following helmet enchantments affect Contagion.

Note that helmet enchantments are no longer obtainable since version 3.23.0 and can only be obtained in permanent leagues as already enchanted items from before this patch.

NameFor generated item/monster modifiers the minimum item/monster level respectively. Some generation types may not require this condition to be met, however item level restrictions may be raised to 80% of this value.LabyrinthStatsSpawn Weighting
Enchantment Contagion Damage 166Merciless Labyrinth25% increased Contagion Damagehelmet 100
Enchantment Contagion Damage 275Eternal Labyrinth40% increased Contagion Damagehelmet 100
Enchantment Contagion Duration 166Merciless Labyrinth20% increased Contagion Durationhelmet 100
Enchantment Contagion Duration 275Eternal Labyrinth30% increased Contagion Durationhelmet 100
Enchantment Contagion Radius 166Merciless Labyrinth16% increased Contagion Area of Effecthelmet 100
Enchantment Contagion Radius 275Eternal Labyrinth24% increased Contagion Area of Effecthelmet 100

Alternate skill effects

Contagion has the following alternate skill effects:

ItemEffect(s)
Arcane Contagion EffectArcane Contagion EffectSkill Gem EffectYour Contagion becomes a blue arcane effect.Your Contagion becomes a blue arcane effect.
Celestial Contagion EffectCelestial Contagion EffectSkill Gem EffectYour Contagion becomes a Celestial Effect.Your Contagion becomes a Celestial Effect.
Project Contagion EffectProject Contagion EffectSkill Gem EffectYour Contagion becomes a Project Effect.Your Contagion becomes a Project Effect.
Scientist Contagion EffectScientist Contagion EffectSkill Gem EffectYour Contagion becomes a Scientist Effect.Your Contagion becomes a Scientist Effect.
Sunprism Contagion EffectSunprism Contagion EffectSkill Gem EffectYour Contagion becomes a Sunprism Effect.Your Contagion becomes a Sunprism Effect.

Version history

Version Changes
3.23.0
  • Quality now provides +0-0.2 metres to radius, instead of 0-10% increased Area of Effect.
3.13.0
  • Now has a base radius of 17 (from 20).
3.12.0
  • Now has alternative quality.
3.8.0
  • No longer gains additional radius as the gem levels (previously gained +4 radius by gem level 20).
3.6.0
  • Mana Cost at gem level 1 is now 5 (was 11).
  • Mana Cost at gem level 20 is now 20 (was 28).
  • Can now affect up to 40 targets per cast (from 20).
2.6.0
  • Contagion's radius has increased from 18 to 20 units.
2.2.1d
  • Fixed an instance crash with Contagion.
2.1.1c
  • Fixed an instance crash with [...] Contagion.
2.1.1b
  • Fixed a bug where Contagion could be cast and spread through walls.
2.1.1
  • Contagion can now be supported by Iron Will.
2.1.0
  • Added to the game.

References

  1. Mark_GGG (August 1, 2016). "Mechanical Questions Thread". Official Path of Exile Forums. Retrieved August 1, 2016.
  2. Rory (May 3, 2017). "Damage Over Time Changes - Part 2". Official Path of Exile Forums. Retrieved August 7, 2017.

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