Ability Cooldown

Ability Cooldown is the time it takes for an Ability to be usable again. This stat also affects Item cooldowns.

Overview

Cooldowns range from a few seconds, as in Lady Geist's Malice, to a few minutes, as Dynamo's Singularity. Ability cooldowns can be reduced by acquiring the Cooldown Reduction stat, which reduces the cooldown by a percentage of base ability time.

Charged Abilities

Some abilities can acquire multiple charges. In those cases, the ability cooldown represents the time for a charge to become available again after being used. This should not be confused with the time between charges, which describes the delay after using a charge that a different charge can be used.

Stacking

Despite being presented in-game as +X% Cooldown Reduction, different sources of cooldown reduction stack multiplicatively, not additively. With $n$ different sources of cooldown reduction, total cooldown reduction is given by:

$C{R}_{Total}=1-\prod _{i=1}^n(1-C{R}_i)$

For example, with 12% Cooldown Reduction from Diviner's Kevlar and 16% Cooldown Reduction from Improved Cooldown, total cooldown reduction is:

$C{R}_{Total}=1-(1-0.12)\times (1-0.16)\approx 26\mathrm{\%}$

Sources of Cooldown Reduction

Items that reduce the cooldown of all abilities and items:

List of items

Name	Cost	Category	Stat change
Enchanted Holsters	6,400	Weapon	+12% Ability Cooldown Reduction
Enchanter's Emblem	1,600	Vitality	+7% Ability Cooldown Reduction
Witchmail	6,400	Vitality	+7% Ability Cooldown Reduction
Compress Cooldown	1,600	Spirit	+18% Ability Cooldown Reduction
Superior Cooldown	3,200	Spirit	+27% Ability Cooldown Reduction
Echo Shard	6,400	Spirit	+5% Ability Cooldown Reduction
Scourge	6,400	Spirit	+6% Ability Cooldown Reduction

• Superior Cooldown reduces the cooldown of the imbued ability by % and of non-imbued abilities by %.

Items that only reduce the cooldown of charged abilities:

List of items

Name	Cost	Category	Stat change

Additionally, Golden Statues have a chance to drop a permanent Cooldown Reduction buff.