Chaos is a school of magic wielded by warlocks and demon hunters. It's a uniquely comprehensive multi-school, combining five or more of the seven damage types. It always includes Arcane, Fire, Frost, Nature, and Shadow; and can optionally include Holy and Physical.
Multi-school abilities benefit from bonuses that affect any of their schools, use the lowest resistance value among their schools, ignore absorption and immunity effects that apply to only some of their schools, and can be used even when one or more of their schools have been locked with an interrupt effect.
Chaos's nature guarantees that damage done will not be mitigated by any armor, resistances or school-specific effects the target might possess. However, mitigation and immunity abilities that are not school-specific (such as and ) as well as damage-absorption shields provide by abilities like and will still absorb, mitigate or completely prevent damage from this school. Due to its comprehensive nature, it is impossible for players to be locked out of the Chaos school unless a Chaos spell itself is interrupted, in which case spells of all included schools will be locked out.
- In Warcraft III: Reign of Chaos, Chaos was an attack type that did full damage to all armor types.
- The combination of Arcane, Fire, Frost, Nature, and Shadow damage is sometimes referred to as "Chromatic damage" among players.
- Patch 5.0.4 (2012-08-28): Made available with the introduction of and .