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:

$C R_{T o t a l} = 1 - \prod_{i = 1}^{n} (1 - C R_{i})$

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

$C R_{T o t a l} = 1 - (1 - 0.12) \times (1 - 0.16) \approx 26 %$

Sources of Cooldown Reduction

Items that reduce the cooldown of all abilities and items:

List of items
Name	Cost	Category	Stat change
Spiritual Overflow	6,000	Weapon	+12% Ability Cooldown Reduction
Improved Cooldown	1,250	Spirit	+14% Ability Cooldown Reduction
Superior Cooldown	4,250	Spirit	+32% Ability Cooldown Reduction
Diviner's Kevlar	6,000	Spirit	+10% Ability Cooldown Reduction

Superior Cooldown reduces the cooldown of the imbued ability by 32% and of non-imbued abilities by 24%.

Items that only reduce the cooldown of charged abilities:

List of items
Name	Cost	Category	Stat change
Extra Charge	500	Spirit	+10% Charge Cooldown Reduction
Rapid Recharge	3,500	Spirit	+25% Charge Cooldown Reduction

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