Cast when Damage Taken Support

Cast when Damage Taken is a trigger gem. It causes a linked spell to activate when the player accumulates damage taken.

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.

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.

Targeting: Targeted spells will cast towards the enemy that caused the last damage. Reflected damage is considered to come from the enemy originally damaged.

Cooldown: Cast when Damage Taken has a cooldown of 250ms, or the linked skill's cooldown, whichever is longer. Each linked spell has its own cooldown and internal damage counter. The damage counter will not increase while the spell is cooling down. This can cause skills intended to be simultaneous to get out of sync (e.g. Immortal Call will keep counting damage while Enduring Cry is on cooldown, so they will end up going off at different times).

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.

Gem level progression

Template:GemLevelTable |- ! 1 | 31 || 33 || 23 || 70% || 440 || 31 || 179,320 |- ! 2 | 33 || 35 || 24 || 66% || 490 || 33 || 225,766 |- ! 3 | 35 || 37 || 25 || 62% || 560 || 35 || 282,073 |- ! 4 | 37 || 39 || 27 || 58% || 620 || 37 || 349,759 |- ! 5 | 39 || 40 || 28 || 54% || 700 || 39 || 431,204 |- ! 6 | 41 || 42 || 29 || 50% || 780 || 41 || 528,465 |- ! 7 | 43 || 44 || 31 || 46% || 880 || 43 || 644,165 |- ! 8 | 45 || 46 || 32 || 42% || 980 || 45 || 782,325 |- ! 9 | 47 || 48 || 33 || 38% || 1090 || 47 || 945,554 |- ! 10 | 49 || 50 || 35 || 34% || 1220 || 49 || 1,138,877 |- ! 11 | 51 || 52 || 36 || 30% || 1350 || 51 || 1,368,223 |- ! 12 | 53 || 54 || 37 || 26% || 1500 || 53 || 1,638,338 |- ! 13 | 55 || 56 || 39 || 22% || 1670 || 55 || 1,956,648 |- ! 14 | 57 || 57 || 40 || 18% || 1850 || 57 || 2,329,968 |- ! 15 | 59 || 59 || 41 || 14% || 2060 || 59 || 9,826,462 |- ! 16 | 61 || 61 || 43 || 10% || 2280 || 61 || 21,126,787 |- ! 17 | 63 || 63 || 44 || 6% || 2520 || 63 || 50,254,966 |- ! 18 | 65 || 65 || 45 || 2% || 2790 || 65 || 89,391,985 |- ! 19 | 67 || 67 || 46 || -2% || 3080 || 67 || 146,266,188 |- ! 20 | 69 || 69 || 48 || -6% || 3240 || 69 || class="table-na" style="text-align: center; " | N/A |- ! 21 | 71 || 71 || 49 || -10% || 3580 || 71 || class="table-na" style="text-align: center; " | N/A |- ! 22 | 73? || 73? || ? || -14% || 3950 || 73 || class="table-na" style="text-align: center; " | N/A |}

Quest reward

This skill can be gained as a reward for finishing quests:

• A Fixture of Fate in Act 3 (Merciless), by all classes.

Strategy

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:

• to block enemies.
• to create ground ice.
• Passive corpse disposal/minion buffing via , , or Bone Offering.
• 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 :

• Passive IIR culling via , , and a skill that causes many hits.

Version history

Version	Changes
1.?.?	Gems may now only be supported by a single trigger gem, gems supported by multiple trigger gems will be disabled.
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.
1.0.0f	Cooldown of 250ms added.
1.0.0	Cast when Damage Taken has been added to the game.