Cast when Damage Taken
This gem can only Support Skill Gems of level x or lower
x% less Damage
You cannot Cast Supported Spells directly
100% chance to Cast Supported Spells when you take a total of x Damage
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.
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).
Gem level progression
|Level|| x% less
| Maximum Level of
This skill can be gained as a reward for finishing quests:
- A Fixture of Fate in Act 3 (Merciless), by all classes.