|help_text = 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.
|damage_effectiveness=
|strength_percent = 60
|quality=0.5% increased Damage
|intelligence_percent = 40
|mana_cost=
|gem_tags = Support, Spell, Trigger
|required_level=31
|skill_id = SupportCastOnDamageTaken
|description=
|support_gem_letter = !
|modifier1=This Gem can only Support Skill Gems requiring Level x or lower
|stat_text = This Gem can only Support Skill Gems requiring Level (38-70) or lower<br>Supported Skills deal (65-27)% less Damage<br>Trigger Supported Spells when you take (528-3272) total Damage from Hits
|level1 = True
|level1_level_requirement = 38
|level1_stat_text = This Gem can only Support Skill Gems requiring Level 38 or lower<br>Supported Skills deal 65% less Damage<br>Trigger Supported Spells when you take 528 total Damage from Hits
|level2_stat_text = This Gem can only Support Skill Gems requiring Level 40 or lower<br>Supported Skills deal 63% less Damage<br>Trigger Supported Spells when you take 583 total Damage from Hits
|level3_stat_text = This Gem can only Support Skill Gems requiring Level 42 or lower<br>Supported Skills deal 61% less Damage<br>Trigger Supported Spells when you take 661 total Damage from Hits
|level4_stat_text = This Gem can only Support Skill Gems requiring Level 44 or lower<br>Supported Skills deal 59% less Damage<br>Trigger Supported Spells when you take 725 total Damage from Hits
|level5_stat_text = This Gem can only Support Skill Gems requiring Level 46 or lower<br>Supported Skills deal 57% less Damage<br>Trigger Supported Spells when you take 812 total Damage from Hits
|level6_stat_text = This Gem can only Support Skill Gems requiring Level 48 or lower<br>Supported Skills deal 55% less Damage<br>Trigger Supported Spells when you take 897 total Damage from Hits
|level7_stat_text = This Gem can only Support Skill Gems requiring Level 50 or lower<br>Supported Skills deal 53% less Damage<br>Trigger Supported Spells when you take 1003 total Damage from Hits
|level8_stat_text = This Gem can only Support Skill Gems requiring Level 52 or lower<br>Supported Skills deal 51% less Damage<br>Trigger Supported Spells when you take 1107 total Damage from Hits
|level9_stat_text = This Gem can only Support Skill Gems requiring Level 54 or lower<br>Supported Skills deal 49% less Damage<br>Trigger Supported Spells when you take 1221 total Damage from Hits
|level10_stat_text = This Gem can only Support Skill Gems requiring Level 56 or lower<br>Supported Skills deal 47% less Damage<br>Trigger Supported Spells when you take 1354 total Damage from Hits
|level11_stat_text = This Gem can only Support Skill Gems requiring Level 58 or lower<br>Supported Skills deal 45% less Damage<br>Trigger Supported Spells when you take 1485 total Damage from Hits
|level12_stat_text = This Gem can only Support Skill Gems requiring Level 60 or lower<br>Supported Skills deal 43% less Damage<br>Trigger Supported Spells when you take 1635 total Damage from Hits
|level13_stat_text = This Gem can only Support Skill Gems requiring Level 62 or lower<br>Supported Skills deal 41% less Damage<br>Trigger Supported Spells when you take 1804 total Damage from Hits
|level14_stat_text = This Gem can only Support Skill Gems requiring Level 64 or lower<br>Supported Skills deal 39% less Damage<br>Trigger Supported Spells when you take 1980 total Damage from Hits
|level15_stat_text = This Gem can only Support Skill Gems requiring Level 65 or lower<br>Supported Skills deal 37% less Damage<br>Trigger Supported Spells when you take 2184 total Damage from Hits
|level16_stat_text = This Gem can only Support Skill Gems requiring Level 66 or lower<br>Supported Skills deal 35% less Damage<br>Trigger Supported Spells when you take 2394 total Damage from Hits
|level17_stat_text = This Gem can only Support Skill Gems requiring Level 67 or lower<br>Supported Skills deal 33% less Damage<br>Trigger Supported Spells when you take 2621 total Damage from Hits
|level18_stat_text = This Gem can only Support Skill Gems requiring Level 68 or lower<br>Supported Skills deal 31% less Damage<br>Trigger Supported Spells when you take 2874 total Damage from Hits
|level19_stat_text = This Gem can only Support Skill Gems requiring Level 69 or lower<br>Supported Skills deal 29% less Damage<br>Trigger Supported Spells when you take 3142 total Damage from Hits
|level20_stat_text = This Gem can only Support Skill Gems requiring Level 70 or lower<br>Supported Skills deal 27% less Damage<br>Trigger Supported Spells when you take 3272 total Damage from Hits
|level21_stat_text = This Gem can only Support Skill Gems requiring Level 72 or lower<br>Supported Skills deal 25% less Damage<br>Trigger Supported Spells when you take 3580 total Damage from Hits
|level22_stat_text = This Gem can only Support Skill Gems requiring Level 74 or lower<br>Supported Skills deal 23% less Damage<br>Trigger Supported Spells when you take 3950 total Damage from Hits
|level23_stat_text = This Gem can only Support Skill Gems requiring Level 76 or lower<br>Supported Skills deal 21% less Damage<br>Trigger Supported Spells when you take 4350 total Damage from Hits
|level24_stat_text = This Gem can only Support Skill Gems requiring Level 78 or lower<br>Supported Skills deal 19% less Damage<br>Trigger Supported Spells when you take 4780 total Damage from Hits
|level25_stat_text = This Gem can only Support Skill Gems requiring Level 80 or lower<br>Supported Skills deal 17% less Damage<br>Trigger Supported Spells when you take 5240 total Damage from Hits
|level26_stat_text = This Gem can only Support Skill Gems requiring Level 82 or lower<br>Supported Skills deal 15% less Damage<br>Trigger Supported Spells when you take 5730 total Damage from Hits
|level27_stat_text = This Gem can only Support Skill Gems requiring Level 84 or lower<br>Supported Skills deal 13% less Damage<br>Trigger Supported Spells when you take 6250 total Damage from Hits
|level28_stat_text = This Gem can only Support Skill Gems requiring Level 86 or lower<br>Supported Skills deal 11% less Damage<br>Trigger Supported Spells when you take 6800 total Damage from Hits
|level29_stat_text = This Gem can only Support Skill Gems requiring Level 88 or lower<br>Supported Skills deal 9% less Damage<br>Trigger Supported Spells when you take 7380 total Damage from Hits
|level30_stat_text = This Gem can only Support Skill Gems requiring Level 90 or lower<br>Supported Skills deal 7% less Damage<br>Trigger Supported Spells when you take 7990 total Damage from Hits
|level31_stat_text = This Gem can only Support Skill Gems requiring Level 91 or lower<br>Supported Skills deal 6% less Damage<br>Trigger Supported Spells when you take 8310 total Damage from Hits
|level32_stat_text = This Gem can only Support Skill Gems requiring Level 92 or lower<br>Supported Skills deal 5% less Damage<br>Trigger Supported Spells when you take 8630 total Damage from Hits
|level33_stat_text = This Gem can only Support Skill Gems requiring Level 93 or lower<br>Supported Skills deal 4% less Damage<br>Trigger Supported Spells when you take 8965 total Damage from Hits
|level34_stat_text = This Gem can only Support Skill Gems requiring Level 94 or lower<br>Supported Skills deal 3% less Damage<br>Trigger Supported Spells when you take 9300 total Damage from Hits
|level35_stat_text = This Gem can only Support Skill Gems requiring Level 95 or lower<br>Supported Skills deal 2% less Damage<br>Trigger Supported Spells when you take 9650 total Damage from Hits
|level36_stat_text = This Gem can only Support Skill Gems requiring Level 96 or lower<br>Supported Skills deal 1% less Damage<br>Trigger Supported Spells when you take 10000 total Damage from Hits
|level37_stat_text = This Gem can only Support Skill Gems requiring Level 97 or lower<br>Trigger Supported Spells when you take 10365 total Damage from Hits
|level38_stat_text = This Gem can only Support Skill Gems requiring Level 98 or lower<br>Supported Skills deal 1% more Damage<br>Trigger Supported Spells when you take 10730 total Damage from Hits
|level39_stat_text = This Gem can only Support Skill Gems requiring Level 99 or lower<br>Supported Skills deal 2% more Damage<br>Trigger Supported Spells when you take 11110 total Damage from Hits
|level40_stat_text = This Gem can only Support Skill Gems requiring Level 100 or lower<br>Supported Skills deal 3% more Damage<br>Trigger Supported Spells when you take 11490 total Damage from Hits
|gem_description = Each supported spell skill will track damage you take, and be triggered when the total damage taken reaches a threshold. Cannot support skills used by totems, traps, or mines. Vaal skills, channelling skills, and skills with a reservation cannot be triggered.
|level1_strength_requirement = 40
|level1_intelligence_requirement = 27
|level1_experience = 0
|level2_strength_requirement = 41
|level2_intelligence_requirement = 29
|level2_experience = 388734
|level3_strength_requirement = 43
|level3_intelligence_requirement = 30
|level3_experience = 866171
|level4_strength_requirement = 45
|level4_intelligence_requirement = 31
|level4_experience = 1449957
|level5_strength_requirement = 47
|level5_intelligence_requirement = 33
|level5_experience = 2160316
|level6_strength_requirement = 49
|level6_intelligence_requirement = 34
|level6_experience = 3515827
|level7_strength_requirement = 51
|level7_intelligence_requirement = 35
|level7_experience = 4654704
|level8_strength_requirement = 53
|level8_intelligence_requirement = 37
|level8_experience = 6022937
|level9_strength_requirement = 55
|level9_intelligence_requirement = 38
|level9_experience = 7661275
|level10_strength_requirement = 57
|level10_intelligence_requirement = 39
|level10_experience = 9617923
|level11_strength_requirement = 58
|level11_intelligence_requirement = 41
|level11_experience = 13273107
|level12_strength_requirement = 60
|level12_intelligence_requirement = 42
|level12_experience = 16290434
|level13_strength_requirement = 62
|level13_intelligence_requirement = 43
|level13_experience = 19866666
|level14_strength_requirement = 64
|level14_intelligence_requirement = 44
|level14_experience = 24098333
|level15_strength_requirement = 65
|level15_intelligence_requirement = 45
|level15_experience = 26493411
|level16_strength_requirement = 66
|level16_intelligence_requirement = 46
|level16_experience = 34914474
|level17_strength_requirement = 67
|level17_intelligence_requirement = 46
|level17_experience = 51074457
|level18_strength_requirement = 68
|level18_intelligence_requirement = 47
|level18_experience = 92244824
|level19_strength_requirement = 69
|level19_intelligence_requirement = 48
|level19_experience = 179039272
|level20_strength_requirement = 70
|level20_intelligence_requirement = 48
|level20_experience = 336444335
|level21_strength_requirement = 72
|level21_intelligence_requirement = 50
|name_list = Cast when Damage Taken
|release_version = 1.0.0
|quest_reward1_type = vendor
|quest_reward1_quest = The Eternal Nightmare
|quest_reward1_quest_id = a4q1
|quest_reward1_act = 4
|quest_reward1_npc = Petarus and Vanja
|quest_reward2_type = vendor
|quest_reward2_quest = Fallen from Grace
|quest_reward2_quest_id = a6q4
|quest_reward2_act = 6
|quest_reward2_npc = Lilly Roth
}}
}}
'''Cast when Damage Taken''' is a [[trigger gem]]. It causes a linked [[spell]] to activate when the player accumulates [[damage]] taken.
'''Cast when Damage Taken''' is a [[support gem]]. It causes a linked [[spell]] to [[trigger gem|trigger]] when the player takes a certain amount of damage from hits.
==Skill Functions and Interactions==
==Skill functions and interactions==
'''Trigger Gem:''' Like all trigger gems, Cast when Damage Taken only "casts" spells. Attack gems such as Double Strike are not considered spells. Multiple spells can be linked to a single trigger gem but if two or more spells are of the same type (e.g.: Cast when Damage Taken - Fireball - Fireball) they will never trigger simultaneously, even if they are not on the same link. The order in which they are linked determines the order in which they cast (e.g.: Cast when Damage Taken - Enduring Cry - Immortal Call will cast Enduring Cry first, allowing Immortal Call to consume the charges immediately. In the other order, Immortal Call with consume existing charges, then new charges will be produced by Enduring Cry). The top end of the linked sockets (for four-links, the top left socket) is the first in the order, followed by each socket down the line, following links.
'''Trigger gem''': Cast when Damage Taken supports spells. Multiple different spells can be supported, and each will have their own [[damage taken]] counter and [[cooldown]]. Multiple copies of Cast when Damage Taken will also function independently, as long as they don't support copies of the same active skill, which would cause a shared cooldown.
'''Damage Counter and Cooldown:''' Each linked skill has an internal damage counter that tracks the total accumulated damage taken from [[hit|hits]], but not from [[damage over time]]<ref>{{cite web|author=Mark_GGG|date=9 October 2013|title=Path of Exile Forum|url=https://www.pathofexile.com/forum/view-thread/537105|accessdate=2 July 2015}}</ref> (e.g. you cannot use [[Righteous Fire]] to trigger Cast when Damage Taken). All damage counters will be reset to 0 upon entering a new area. When a linked skill is cast, its damage counter will go on cooldown for 250 ms and will not track damage during that time. Furthermore, Cast when Damage Taken has its own cooldown of 250 ms, and a linked skill can only be cast when both its own damage counter and Cast when Damage Taken are not on cooldown. This can cause skills intended to be simultaneous to get out of sync.
'''Damage counter and trigger cooldown''': The Cast when Damage Taken gem itself does not have a counter or cooldown, only spells it supports do.<ref>{{cite web|author=Mark_GGG|date=May 20, 2014|title=Path of Exile Forum|url=https://www.pathofexile.com/forum/view-thread/929800/page/1#p7891277}}</ref> Each supported skill has an internal damage counter that tracks the total accumulated damage taken from [[hit]]s. [[Damage over time]] and non-damage [[loss]] do not contribute to this counter, i.e. you cannot use {{il|Righteous Fire}} to trigger Cast when Damage Taken.<ref>{{cite web|author=Mark_GGG|date=9 October 2013|title=Path of Exile Forum|url=https://www.pathofexile.com/forum/view-thread/537105|accessdate=2 July 2015}}</ref> All damage counters will be reset to 0 upon entering a new area. A skill does not track damage taken while it is on cooldown. If the damage threshold is met but the skill cannot trigger (e.g. due to insufficient mana), the damage counter resets.
'''Damage effectiveness:''' The damage effectiveness increases with level, but so does the damage taken per cast; overall, the amount of damage that needs to be taken per damage effectiveness goes ''up'' at higher gem levels. The optimum is a level 2 gem, which requires 1442 damage taken per 100% damage effectiveness. In comparison, a level 20 gem requires 3057 damage taken per 100% damage effectiveness.
'''Skill cooldowns''': Because skills can only have one cooldown, Cast when Damage Taken does not add its 0.25s cooldown to skills that already have a cooldown that's equal or higher.
'''Targeting:''' Targeted spells will cast towards the enemy that caused the last damage. Reflected damage is considered to come from the enemy originally damaged.
'''Maximum level of supported skills''': Cast when Damage Taken cannot support skills with a higher level requirement than that of Cast when Damage Taken itself. This restriction only applies to skill gems; support gems are not affected.
'''Maximum Level of Supported Skills:''' Cast when Damage Taken cannot support skills of higher level than specified. Note that this restriction only applies to active skills; any level of supports may be used.
'''Trigger order''': If multiple triggers proc simultaneously, skills triggered follow a [[Trigger#Trigger_order|set order]].
'''Targeting''': Triggered spells will target the location of the entity that dealt the hit that caused the trigger. [[Reflect]]ed damage is considered to come from the enemy which the damage was reflected from. If triggered by [[self-damage]], it will target a random enemy, or if there are no enemies, it will target the player's location or a random direction, depending on the triggered skill.<ref>Based on experimentation with Heartbound Loop</ref><ref>https://www.pathofexile.com/forum/view-thread/3306922/filter-account-type/staff</ref>
==Gem level progression==
==Gem level progression==
{{GemLevelTable
{{Skill progression
| str = yes
|c1_abbr = Damage<br>Threshold
| int = yes
|c1_header = Trigger Supported Spells when you take a total of x Damage
| c1 = x% less <br> Damage
|c1_pattern_extract = Trigger Supported Spells when you take (%d+) total Damage
| c2 = {{abbr|Total <br> Damage|100% chance to Cast Supported Spells when you take a total of x Damage}}
|c1_pattern_value = %d
| c3 = {{abbr|Maximum Level of<br>Supported Skills|This gem can only Support Skill Gems of level x or lower}}
|c2_abbr = less/more<br>Damage
|c2_header = x% less Damage x% more Damage
|c2_pattern_extract = deal (%d+)%% (%a+) Damage
|c2_pattern_value = %d%% %s
|c3_abbr = Maximum Level of<br>Supported Skill Gems
|c3_header = This Gem can only Support Skill Gems requiring Level x or lower
|c3_pattern_extract = This Gem can only Support Skill Gems requiring Level (%d+) or lower
Please visit the [[Quest Rewards]] page for information on how to acquire this gem.
== Strategy ==
==Related unique items==
The following [[unique item]]s are related to Cast when Damage Taken Support:
{{Drop enabled unique item table
|where=items.stat_text LIKE "%Cast%when%Damage%Taken%"
OR items.stat_text LIKE "%random%Support%Gem%"
|large=1
|base_item=1
|level=1
|stat=1
}}
Due to the large amount of damage taken needed per damage effectiveness and the rapid scaling of damage taken required per level, it is advisable to use spells for purposes other than damage that do not depend heavily on the active skill level. Possible choices include:
{{Alternate skill effect list|skill=Cast when Damage Taken}}
* {{sl|Enduring Cry}}
==Cats when Damage Taken==
* {{sl|Immortal Call}}
[[File:Cats when Damage Taken.jpg|250px|thumb|right|Cats spawned by Cats when Damage Taken]]
* {{sl|Frost Wall}} to block enemies.
* {{sl|Arctic Breath}} to create ground ice.
* Passive corpse disposal/minion buffing via {{sl|Detonate Dead}}, {{sl|Flesh Offering}}, or {{sl|Bone Offering}}.
* {{sl|Lightning Warp}} to escape melee range. (Could backfire.)
* Curses. This can be a reliable way of automatically casting curses, at the cost of lower curse level.
Some supports also potentially combine well, especially with a persistent rapid-firing skill such as {{sl|Ball Lightning}}:
* {{sl|Blind}}
* {{sl|Chance to Flee}}
* Passive IIR culling via {{sl|Culling Strike}}, {{sl|Item Rarity}}, and a skill that causes many hits.
* {{sl|Curse on Hit}}
* {{sl|Knockback}}
* {{sl|Power Charge On Critical}}
'''Cats when Damage Taken''' was a [[trigger gem]] available only on April 1, 2015 as an April Fool's joke.<ref>{{cite web|author=Chris|date=April 1, 2015 |title=Incident Report for April 1 Catastrophe|url=https://www.pathofexile.com/forum/view-thread/1233642|accessdate=April 1, 2015}}</ref> Like '''Cast when Damage Taken''', it caused a linked [[spell]] to activate when the player accumulated [[damage]] taken, but besides casting the spell, it also summoned black cats. Other properties were identical to the Cast when Damage Taken skill.
==Cats when Damage Taken==
'''Cats when Damage Taken''' was a [[trigger gem]] available only on April 1st 2015. It was a bug caused by a typo in source code<ref>{{cite web|author=Chris|date=April 1, 2015 |title=Incident Report for April 1 Catastrophe|url=http://www.pathofexile.com/forum/view-thread/1233642|accessdate=April 1, 2015}}</ref>. '''Like Cast when Damage Taken''', it caused a linked [[spell]] to activate when the player accumulated [[damage]] taken, but besides casting the spell, it also summoned black cats. Other properties were identical to the '''Cast when Damage Taken''' skill.
[[File:Cats_when_Damage_Taken.jpg|250px|thumb|right|Cats spawned by Cats when Damage Taken]]
==Version history==
==Version history==
{{VersionHistoryTable}}
{{Version history table header}}
{{VersionHistoryRow|1.3.1g}}
{{Version history table row|3.23.0|
* Quality now causes Supported Skills to require 0-10% reduced amount of Damage taken to Trigger, instead of causing them to deal 0-10% increased Damage.
}}
{{Version history table row|3.19.0|
* Cast when Damage Taken Support now causes Supported Skills to deal 65% less Damage at gem level 1 (previously 70%), up to 27% less Damage at gem level 20 (previously 6% more Damage).
}}
{{Version history table row|3.15.0|
* Trigger skill gems now cost mana.
* Now has a 250% Cost and Reservation Multiplier.
}}
{{Version history table row|?|
* The Divergent alternate gem quality has changed to {{c|mod|Supported Skills require 1% reduced amount of Damage taken to Trigger}} {{Undocumented}}
}}
{{Version history table row|3.12.0|
* Now has alternative gem quality:<ref name=altGem/>
:Divergent: {{c|mod|1% more Damage required to Trigger}} (per 1% quality)
}}
{{Version history table row|2.0.0|
* Enduring Cry is now a Warcry instead of a spell, therefore it can't be cast anymore.
}}
{{Version history table row|1.3.1g|
* Fixed a bug with the trigger gems that cause spells to automatically cats on various conditions.
* Fixed a bug with the trigger gems that cause spells to automatically cats on various conditions.
{{VersionHistoryRow|1.3.1}}
}}
*Spells triggered by Cast on Damage Taken have had their damage reduced by 25%.
{{Version history table row|1.3.1|
{{VersionHistoryRow|1.3.0}}
* Spells triggered by Cast on Damage Taken have had their damage reduced by 25%.
}}
{{Version history table row|1.3.0|
* Trigger gems are now classified as Trigger.
* Trigger gems are now classified as Trigger.
{{VersionHistoryRow|1.2.2}}
}}
{{Version history table row|1.2.2|
* Gems may now only be supported by a single trigger gem, gems supported by multiple trigger gems will be disabled.
* Gems may now only be supported by a single trigger gem, gems supported by multiple trigger gems will be disabled.
{{VersionHistoryRow|1.0.1}}
}}
{{Version history table row|1.0.1|
* The level requirement of gems augmented by Cast on Damage Taken may not exceed the level requirement of the Cast on Damage Taken gem.
* The level requirement of gems augmented by Cast on Damage Taken may not exceed the level requirement of the Cast on Damage Taken gem.
{{VersionHistoryRow|1.0.0f}}
}}
{{Version history table row|1.0.0f|
* Cooldown of 250ms added.
* Cooldown of 250ms added.
{{VersionHistoryRow|1.0.0}}
}}
{{Version history table row|1.0.0|
* Cast when Damage Taken has been added to the game.
* Cast when Damage Taken has been added to the game.
|}
}}
{{Version history table end}}
== See also==
==See also==
* {{sl|Cast on Death}}
* [[Guide:Cast when Damage Taken]]
* {{sl|Cast on Critical Strike}}
* {{il|Cast on Death Support}}
* {{sl|Cast on Melee Kill}}
* {{il|Cast On Critical Strike Support}}
* {{il|Cast on Melee Kill Support}}
== References ==
==References==
<references />
{{reflist|refs=
<ref name=altGem>
{{cite web|url=https://www.pathofexile.com/forum/view-thread/2936122|title=Alternate Quality Gems in Path of Exile: Heist|date=September 17, 2020|accessdate=May 7, 2021|publisher=Official Path of Exile Forums|author=Bex_GGG}}</ref>
}}
{{Navbox Support Gems}}
{{Navbox Support Gems}}
[[Category:Trigger Gems]]
[[ru:Сотворение чар при получении урона]]
[[Category:Strength support gems]]
[[Category:Intelligence support gems]]
[[Category:Spell support gems]]
Revision as of 17:14, 22 May 2024
Cast when Damage Taken SupportSupport, Spell, Trigger Icon: ! Level: (1-20) Cost & Reservation Multiplier: 250% Cooldown Time: 0.25 sec Can Store 1 Use(s)Requires Level 38Each supported spell skill will track damage you take, and be triggered when the total damage taken reaches a threshold. Cannot support skills used by totems, traps, or mines. Vaal skills, channelling skills, and skills with a reservation cannot be triggered.This Gem can only Support Skill Gems requiring Level (38-70) or lower Supported Skills deal (65-27)% less Damage Trigger Supported Spells when you take (528-3272) total Damage from Hits
Additional Effects From 1-20% Quality: Supported Skills require (0.5-10)% reduced amount of Damage taken to TriggerThis 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.
Acquisition Drop level: 38Vendor Offer 1x Scroll FragmentMetadata Item class: Support Gem Metadata ID: Metadata/Items/Gems/SupportGemCastOnDamageTaken
Cast when Damage Taken is a support gem. It causes a linked spell to trigger when the player takes a certain amount of damage from hits.
Trigger gem: Cast when Damage Taken supports spells. Multiple different spells can be supported, and each will have their own damage taken counter and cooldown. Multiple copies of Cast when Damage Taken will also function independently, as long as they don't support copies of the same active skill, which would cause a shared cooldown.
Damage counter and trigger cooldown: The Cast when Damage Taken gem itself does not have a counter or cooldown, only spells it supports do.[1] Each supported skill has an internal damage counter that tracks the total accumulated damage taken from hits. Damage over time and non-damage loss do not contribute to this counter, i.e. you cannot use Righteous FireRighteous FireSpell, AoE, Fire Level: (1-20) Cooldown Time: 0.30 sec Can Store 1 Use(s) Cast Time: InstantRequires Level 16Engulfs you in magical fire that rapidly burns you and nearby enemies. Your spell damage is substantially increased while under this effect. The effect ends when you have 1 life remaining.Deals 70% of your Maximum Life as Base Fire Damage per second Deals 70% of your Maximum Energy Shield as Base Fire Damage per second You Burn for 90% of your Maximum Life per second as Fire Damage You Burn for 70% of your Maximum Energy Shield per second as Fire Damage Grants (20-39)% more Spell Damage Base radius is (1.8-2.3) metres
Additional Effects From 1-20% Quality: Base radius is (0.015-0.3) metresPlace into an item socket of the right colour to gain this skill. Right click to remove from a socket. to trigger Cast when Damage Taken.[2] All damage counters will be reset to 0 upon entering a new area. A skill does not track damage taken while it is on cooldown. If the damage threshold is met but the skill cannot trigger (e.g. due to insufficient mana), the damage counter resets.
Skill cooldowns: Because skills can only have one cooldown, Cast when Damage Taken does not add its 0.25s cooldown to skills that already have a cooldown that's equal or higher.
Maximum level of supported skills: Cast when Damage Taken cannot support skills with a higher level requirement than that of Cast when Damage Taken itself. This restriction only applies to skill gems; support gems are not affected.
Trigger order: If multiple triggers proc simultaneously, skills triggered follow a set order.
Targeting: Triggered spells will target the location of the entity that dealt the hit that caused the trigger. Reflected damage is considered to come from the enemy which the damage was reflected from. If triggered by self-damage, it will target a random enemy, or if there are no enemies, it will target the player's location or a random direction, depending on the triggered skill.[3][4]
Gem level progression
Level
Damage Threshold
less/more Damage
Maximum Level of Supported Skill Gems
Exp.
Total Exp.
1
38
40
27
528
65% less
38
0
0
2
40
41
29
583
63% less
40
388734
388734
3
42
43
30
661
61% less
42
477437
866171
4
44
45
31
725
59% less
44
583786
1449957
5
46
47
33
812
57% less
46
710359
2160316
6
48
49
34
897
55% less
48
1355511
3515827
7
50
51
35
1003
53% less
50
1138877
4654704
8
52
53
37
1107
51% less
52
1368233
6022937
9
54
55
38
1221
49% less
54
1638338
7661275
10
56
57
39
1354
47% less
56
1956648
9617923
11
58
58
41
1485
45% less
58
3655184
13273107
12
60
60
42
1635
43% less
60
3017327
16290434
13
62
62
43
1804
41% less
62
3576232
19866666
14
64
64
44
1980
39% less
64
4231667
24098333
15
65
65
45
2184
37% less
65
2395078
26493411
16
66
66
46
2394
35% less
66
8421063
34914474
17
67
67
46
2621
33% less
67
16159983
51074457
18
68
68
47
2874
31% less
68
41170367
92244824
19
69
69
48
3142
29% less
69
86794448
179039272
20
70
70
48
3272
27% less
70
157405063
336444335
21
72
72
50
3580
25% less
72
N/A
N/A
22
74
N/A
N/A
3950
23% less
74
N/A
N/A
23
76
N/A
N/A
4350
21% less
76
N/A
N/A
24
78
N/A
N/A
4780
19% less
78
N/A
N/A
25
80
N/A
N/A
5240
17% less
80
N/A
N/A
26
82
N/A
N/A
5730
15% less
82
N/A
N/A
27
84
N/A
N/A
6250
13% less
84
N/A
N/A
28
86
N/A
N/A
6800
11% less
86
N/A
N/A
29
88
N/A
N/A
7380
9% less
88
N/A
N/A
30
90
N/A
N/A
7990
7% less
90
N/A
N/A
31
91
N/A
N/A
8310
6% less
91
N/A
N/A
32
92
N/A
N/A
8630
5% less
92
N/A
N/A
33
93
N/A
N/A
8965
4% less
93
N/A
N/A
34
94
N/A
N/A
9300
3% less
94
N/A
N/A
35
95
N/A
N/A
9650
2% less
95
N/A
N/A
36
96
N/A
N/A
10000
1% less
96
N/A
N/A
37
97
N/A
N/A
10365
N/A
97
N/A
N/A
38
98
N/A
N/A
10730
1% more
98
N/A
N/A
39
99
N/A
N/A
11110
2% more
99
N/A
N/A
40
100
N/A
N/A
11490
3% more
100
N/A
N/A
Item acquisition
Cast when Damage Taken Support can drop anywhere.
Recipes
Cast when Damage Taken Support can be created from the following recipes:
Amount
Part
Description
Meta
13
The CataclysmThe Cataclysm13Level 21 Spell Gem CorruptedThe mighty warriors traded in blows, the nimble archers in arrows, yet it was the brazen thaumaturgists who would bring catastrophe to all.
Random corruptedlevel 21 Spell gem
A
9
Gift of the Gemling QueenGift of the Gemling Queen9Level 20 Support GemOur Lady Dialla, as a symbol of our progress, shines greater than all the gems.
Random level 20 support gem
A
7
Dialla's SubjugationDialla's Subjugation7Support Gem Quality:+23% CorruptedA symbol of beauty and innocence The gems corrupted her mind Malachai corrupted her gems All but a glimmer of greatness lost in madness
Random corruptedsupport gem with 23% quality
A
6
The 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 gem
A
3
Gemcutter'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% quality
A
1
Gemcutter's IncubatorGemcutter's IncubatorStack Size: 10Adds an incubated Quality Gem item to an equippable item Item drops after killing {0} monstersRight 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% quality
A
1
The VoidThe Void1Reach into the Void and claim your prize.
Random divination card set exchange
A
Vendor reward
This item can be bought at the listed NPC vendors, after completing the following quests:
The following unique items are related to Cast when Damage Taken Support:
Item
Base Item
Stats
Replica Advancing FortressReplica Advancing Fortress Gut RipperClaw Physical Damage: (40-44) to (106-116.6) Critical Strike Chance: 6.30% Attacks per Second: 1.50 Weapon Range: 1.1 metresRequires Level 46, 80 Dex, 80 IntGrants 44 Life per Enemy HitSocketed Gems are Supported by Level 12 Cast when Damage Taken 15% Chance to BlockAttack Damage (100-120)% increased Physical Damage +(30-50) to maximum Life 50% increased Defences from Equipped Shield Adds 45 to 75 Fire Damage if you've Blocked Recently"Additional test subjects approved. Determine exactly how many wounds need to be endured to activate Prototype #612's energies."
Replica ParadoxicaReplica Paradoxica Vaal RapierOne Handed Sword Physical Damage: 22-87 Critical Strike Chance: 6.50% Attacks per Second: 1.30 Weapon Range: 1.4 metresRequires Level 66, 212 Dex+25% to Global Critical Strike MultiplierVeiled Prefix Veiled Prefix Veiled Suffix Veiled Suffix Veiled Suffix Veiled Prefix <veiled mod pool>"This is one riddle I can't solve." - Researcher GravenTake this item to Jun Ortoi to have her Unveil it.
Bitterbind PointBitterbind Point Titanium Spirit ShieldChance to Block: 25% Energy Shield: (187-246) Movement Speed: -3%Requires Level 68, 159 Int(30-50)% increased Spell Damage (180-220)% increased Energy Shield Spectres have (50-100)% increased maximum Life Gain Arcane Surge when you deal a Critical Strike Your Raised Spectres also gain Arcane Surge when you do (40-50)% increased Critical Strike Chance for Spells per Raised Spectre Veiled PrefixThough we live and act as individuals, in truth, we are tethered together. The barriers that divide us need not be broken for our spirits to become entangled.Take this item to Jun Ortoi to have her Unveil it.
(30-50)% increased Spell Damage (180-220)% increased Energy Shield Spectres have (50-100)% increased maximum Life Gain Arcane Surge when you deal a Critical Strike Your Raised Spectres also gain Arcane Surge when you do (40-50)% increased Critical Strike Chance for Spells per Raised Spectre
Cane of KulemakCane of Kulemak Serpentine StaffWarstaff Physical Damage: 56-117 Critical Strike Chance: 6.30% Attacks per Second: 1.25 Weapon Range: 1.3 metresRequires Level 68, 85 Str, 85 Int+20% Chance to BlockAttack Damage while wielding a Staff(60-90)% increased Unveiled Modifier magnitudes Veiled Prefix Veiled Suffix <Veiled Prefix or Veiled Suffix> <veiled mod pool>Stolen power is still power.Take this item to Jun Ortoi to have her Unveil it.
Forbidden ShakoForbidden Shako Great CrownArmour: (143-161) Energy Shield: (29-33)Requires Level 68, 59 Str, 59 IntSocketed Gems are Supported by Level (1-10) <random Support Gem> Socketed Gems are Supported by Level (25-35) <random Support Gem> +(25-30) to all AttributesThe Azmeri must never touch the Tears of Maji, lest Viridi weep.
Socketed Gems are Supported by Level (1-10) <random Support Gem> Socketed Gems are Supported by Level (25-35) <random Support Gem> +(25-30) to all Attributes
The Hungry LoopThe Hungry Loop Unset RingRequires Level 70Has 1 SocketConsumes Socketed Uncorrupted Support Gems when they reach Maximum Level Can Consume 4 Uncorrupted Support Gems Has not Consumed any Gems <Consumed support gem modifier>Be careful where you put your finger.
Your Cast when Damage Taken becomes a Madcap Effect.
Cats when Damage Taken
Cats spawned by Cats when Damage Taken
Cats when Damage Taken was a trigger gem available only on April 1, 2015 as an April Fool's joke.[5] Like Cast when Damage Taken, it caused a linked spell to activate when the player accumulated damage taken, but besides casting the spell, it also summoned black cats. Other properties were identical to the Cast when Damage Taken skill.
Quality now causes Supported Skills to require 0-10% reduced amount of Damage taken to Trigger, instead of causing them to deal 0-10% increased Damage.
Cast when Damage Taken Support now causes Supported Skills to deal 65% less Damage at gem level 1 (previously 70%), up to 27% less Damage at gem level 20 (previously 6% more Damage).
The Divergent alternate gem quality has changed to Supported Skills require 1% reduced amount of Damage taken to Trigger [Undocumented This change was not documented by any official sources. It was discovered through player testing or datamining.]
Cast on Death SupportCast on Death SupportSupport, Spell, Trigger Icon: ! Level: (1-20) Cost & Reservation Multiplier: 0%Requires Level 38Each supported spell skill will be triggered when you die. Cannot support skills used by totems, traps, or mines. Vaal skills, channelling skills, and skills with a reservation cannot be triggered.(0-152)% more Damage while Dead 100% chance to Trigger Supported Non-Minion Spells on Death Supported Skills Cost nothing
Additional Effects From 1-20% Quality: Supported Skills have (3-60)% increased Area of Effect while DeadThis 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.
Cast On Critical Strike SupportCast On Critical Strike SupportCritical, Support, Spell, Trigger Icon: & Level: (1-20) Cost & Reservation Multiplier: 120% Cooldown Time: 0.15 sec Can Store 1 Use(s)Requires Level 38Must support both an attack skill and a spell skill to work. The attack skill will trigger a spell when it critically strikes an enemy. Cannot support totems, traps, or mines. Vaal skills, channelling skills, and skills with a reservation cannot be triggered.Supported Attacks will Trigger a Supported Spell when you Crit an Enemy Supported Skills deal (19-10)% less Spell Damage
Additional Effects From 1-20% Quality: Supported Skills have (1-20)% increased Attack Critical Strike Chance Supported Skills have (1-20)% increased Spell Critical Strike ChanceThis 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.
Cast on Melee Kill SupportCast on Melee Kill SupportSupport, Melee, Attack, Spell, Trigger Icon: & Level: (1-20) Cost & Reservation Multiplier: 120% Cooldown Time: 0.15 sec Can Store 1 Use(s)Requires Level 38Must support both a melee attack skill and a spell skill to work. The attack skill will trigger a spell when it kills an enemy. Cannot support totems, traps, or mines. Vaal skills, channelling skills, and skills with a reservation cannot be triggered.Supported Melee Attacks will Trigger a Supported Spell on Kill Supported Spells have (20-39)% more Spell Damage
Additional Effects From 1-20% Quality: Supported Skills deal (0.5-10)% increased Attack Damage Supported Skills deal (0.5-10)% increased Spell DamageThis 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.