Cooldown
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A cooldown is a period of wait time before a spell, ability, or item power can be used again.
Contents
Mechanics[edit]
Usually, a skill will be on cooldown if the skill was activated and the cast time of the skill has passed. For instance, Sand King's Epicenter will instantly go on cooldown when activated, since it has no cast time. If the hero is interrupted before the channel time is over, the spell does nothing, and the cooldown and mana is wasted. On the other hand, Sniper's Assassinate and Shadow Fiend's Requiem of Souls have long cast times, and they will not go on cooldown before the cast time is over. Spirit Breaker's Charge of Darkness is an exception to the usual rule; it goes on cooldown once the charge ends or is canceled, not upon cast.
If a hero has several versions of the same item, all versions will be on cooldown upon activating one of them. For instance, all Dagons are in the same cooldown group.
Some abilities or items have multiple cooldowns, using a different duration if their conditions are met. For example Manta Style's cooldown differs for melee and ranged users. Culling Blade's cooldown is 0, but only when successfully killing a hero.
Many abilities have reduced cooldown when leveled up. If an ability is on cooldown and it is leveled up, the current wait time will not be affected at all.
Some abilities have charges and a charge replenish time instead of the usual cooldown. For instance, Sniper's Shrapnel has 3 charges and a 55 seconds replenish time for each charge.
Cooldown manipulation[edit]
Some abilities and items are able to manipulate the cooldowns of abilities. There are several different types of cooldown manipulation:
- Percentage-based reductions and increases
These cooldown modifiers reduce or increase the cooldowns of all abilities and items by a percentage when used. They cause abilities and items to enter a reduced or increased cooldown after being acquired. This means they do not retroactively affect already running cooldowns. Percentage-based cooldown reductions have inconsistent stacking behaviors:
Octarine Core's cooldown reduction stacks multiplicatively with all other sources of percentage-based cooldown modifiers. However, all other sources stack additively with each other.
- Flat reduction and increases
These cooldown modifiers reduce or increase the cooldowns by flat amounts. Unlike percentage-based cooldown modifiers, these can affect abilities which are already on cooldown. Flat changes are applied before percentage-based changes.
- Cooldown resetting
Some abilities are able to completely reset the cooldowns of abilities and items instantly, so that they are ready to use again.
Talents reducing cooldowns[edit]
The following heroes have a talent that reduces all their cooldowns by a percentage.
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Besides these, the following heroes have talents which reduce cooldowns of specific abilities by a flat amount
-8s Unstable Concoction Cooldown:
-2.5s Ice Vortex Cooldown:
-2.5s Blink Cooldown:
-50s Mana Void Cooldown:
-1.5s Spark Wraith Cooldown:- -13s Flamebreak Cooldown:
- -15s Hawks Cooldown:
-6s Blood Rite Cooldown:- -65s Primal Split Cooldown:
- -2s Chaos Strike Cooldown:
-10s Divine Favor Cooldown:- -3s Crypt Swarm Cooldown:
- -3s Kinetic Field Cooldown:
- -10s Glimpse Cooldown:
- -2s Enchant Totem Cooldown:
- -75s Earth Splitter Cooldown:
- -25s Call Down Cooldown:
- -12s Cold Snap Cooldown:
- -16s Tornado Cooldown:
- -60s Relocate Cooldown:
- -1.5s Tidebringer Cooldown:
- -10s Press the Attack Cooldown:
- -4s Frost Blast Cooldown:
- -6s Dragon Slave Cooldown:
- -12s Savage Roar Cooldown:
- -25s Battle Cry Cooldown:
- 0 Entangle Cooldown:
Removes the ability's cooldown completely. - -4s Lucent Beam Cooldown:
- -4s Earthbind Cooldown:
- -5s Poof Cooldown:
- -5s Sacred Arrow cooldown:
- -70 Moonlight Shadow Cooldown:
- -5s Ensnare Cooldown:
- -4s Sprout Cooldown:
- Removed Teleportation Cooldown:
Removes the ability's coooldown completely. - -2.5s Death Pulse Cooldown:
- -40s Dark Ascension Cooldown:
- -8s Heavenly Grace Cooldown:
- -5s Fate's Edict Cooldown:
- -35s Rolling Thunder Cooldown:
- -3s Swashbuckle Cooldown:
- -6s Doppelganger CD:
- -8s Waning Rift Cooldown:
- -1s Netherblast Cooldown:
- -7s Smoke Screen Cooldown:
- -5s Fade Bolt Cooldown:
- -15s Telekinesis Cooldown:
- -1.5s Shadow Poison Cooldown:
- -6s Soul Catcher Cooldown:
- -5s Hex Cooldown:
- -8s Ancient Seal Cooldown:
- -10s Spectral Dagger Cooldown:
- -7s Bulldoze Cooldown:
- -6s Storm Hammer Cooldown:
- -4s Proximity Mines Cooldown:
- -8s Reflection Cooldown:
- -35s Sunder Cooldown:
- -7s Tree Grab CD:
- -9s Avalanche Cooldown:
- -6s Whirling Axes Cooldown:
- -6s Ice Shards Cooldown:
- -2s Decay Cooldown:
- -6s Wave of Terror Cooldown:
- -5s Magic Missile Cooldown:
-8 Venomous Gale CD:- -7s Shadow Word Cooldown:
- -5s Cold Embrace Cooldown:
Sources of reduction[edit]
- Arcane Rune - [[Arcane Rune#|]]Cooldown reduction: 30%
Reduces all cooldowns, including items and passives. Also affects charge replenish times. 
Cooldown reduction: 3/4/5/6
Reduces the current cooldowns of all non-ultimate abilities by a fixed amount. Does not affect items.
Impale cooldown reduction: 7
Reduces the cooldown of Impale by a fixed amount while burrowed.
Cooldown reduction: 25%
Reduces all cooldowns, including items and passives. Also affects charge replenish times.
Cooldown reduction: 20%/35%/50%
Reduces all cooldowns, including items and passives. Also affects charge replenish times.
Sources of increase[edit]
Upon teleporting successfully increases the current cooldown of Town Portal Scrolls, or puts them on a cooldown if they are not on cooldown currently.
Duration: 6/8/10/12
Increases the current cooldowns of all abilities by a fixed amount. Does not affect items.
Sources of resetting[edit]
Resets its own cooldown when the cull succeeds.
Resets its own cooldown when the phantom successfully returns to the caster.
Resets its own cooldown when invoking an already invoked spell.
Resets cooldowns of all spells, except ultimates, for self and the allied hero when upgraded. Does not reset any item cooldowns.
Resets cooldowns of all spells and items.- Refresher Shard - [[Refresher Shard#|]]
Resets cooldowns of all spells and items, except for Refresher Orb. 
Resets its own cooldown when cast on self.
Resets all cooldowns, except the following: Arcane Boots, Black King Bar, Bottle, Hand of Midas, Helm of the Dominator, Linken's Sphere Necronomicon, Pipe of Insight, Refresher Orb and Refresher Shard.
Other interactions[edit]
Taking hero or Roshan-based damage triggers a short cooldown.
The heal restricting buff's duration is affected by percentage-based cooldown reductions.- Heart of Tarrasque - [[Heart of Tarrasque#|]]
Taking hero or Roshan-based damage triggers a short cooldown. 
Uses a different cooldown when using the Cataclysm talent.
Triggers the cooldown upon cast, and again when the buff on the ally blocks a spell.
Uses a different cooldown for melee and ranged users.
Taking hero or Roshan-based damage triggers a short cooldown. Cooldown also triggers upon landing on a tree after a jump, and upon unperching from a tree.
Casting one Adaptive Strike puts the other on a short cooldown.
Cooldown triggers upon losing the provided buff, rather than upon cast.
The armor loss on the caster is bound to the cooldown of the item.
Taking hero or Roshan-based damage triggers a short cooldown.
Cooldown triggers when the charge ends, rather than upon cast.
Cooldown triggers upon losing the tree, rather than upon cast.
The downtime is affected by percentage-based cooldown reductions, but cannot be reset.
The cooldown of the sub-spell on the hero periodically sets itself equal to the shortest cooldown of Stone Form on the Familiars.
Unaffected by cooldown manipulation[edit]
The following abilities have cooldowns that are unaffected by cooldown manipulation for several reasons:
- The ability may use a custom cooldown system, which is not covered by default cooldown manipulation.
- The ability may use a cooldown for other purposes, for example, to indicate a delay before taking effect, like the effect delay of invisibility.
Cooldown: 2.3
Unlike Skull Basher, Abyssal Blade's bash uses a custom cooldown system, because a regular cooldown would prevent the player from using the item's active ability.
Cooldown: 0.45/0.4/0.35/0.3
Counter Helix uses a custom cooldown system for unknown reasons.- Damage cooldown: 3
Instead of getting disabled by damage, Blink Dagger goes on a fixed cooldown instead. The cooldown is affected by cooldown resetting. - Cooldown: 13
The cooldown that triggers when blocking a spell for an ally always uses the default cooldown value for unknown reasons. - Damage cooldown: 3
Instead of getting disabled by damage, Tree Dance goes on a fixed cooldown instead. The cooldown is affected by cooldown resetting. 
Cooldown: 0.2
Maelstrom uses a custom cooldown system for unknown reasons.
Heal stack limit: 25
Unlike Guardian Greaves, Mekansm's heal stack limit duration is not affected by cooldown reductions, despite both items using the same modifier.- Mjollnir - [[Mjollnir#|]]
Cooldown: Lua error in Module:Show at line 62: attempt to index field '?' (a nil value).
Mjollnir's Chain Lightning uses a custom cooldown system, because a regular cooldown would prevent the player from using the item's active ability. 
Interval: 6/5/4/3
Unstable Current uses the cooldown system to indicate its downtime after triggering. It has visual purposes only.
Fade delay: 7.5/6/4.5/3
Cloak and Dagger uses the cooldown system to indicate its fade delay for the invisibility. It has visual purposes only.
Fade delay: 4/3.5/3/2.5
Nature's Guise uses the cooldown system to indicate its fade delay for the invisibility. It has visual purposes only.
Charges[edit]
Some abilities use the ability charge mechanic, instead of cooldowns. These abilities have a set number of charges on them, which replenish over time. Instead of going on cooldown, these abilities use up one charge per cast. This means when having multiple charges, they can be cast quickly in succession, but cannot be used when having no charges left. Each charge takes a certain time to replenish. Multiple charges of a spell do not replenish at the same time, they recharge one after another.
Charge-based abilities will appear to be on cooldown when using the last charge. This "cooldown" however is only to visualise when the next charge is going to be ready again.
The replenish time of charges can be affected by the cooldown reductions of Octarine Core, Arcane Rune, and talents, and can all be replenished with Refresher Orb. Other sources of cooldown manipulation cannot grant charges back or affect the recharge times.
Charge-based abilities[edit]
The following abilities use the charge system:
Max charges: 0 (
2)
Charge replenish time: 0 ( 40)
Max charges: 2/4/6/8
Charge replenish time: 45 (
36)
Max charges: 1/2/3/4
Charge replenish time: 60/52/44/36
Max charges: 7
Charge replenish time: 30
Max charges: 3
Charge replenish time: 38 ( 13)
Max charges: 0 ( 2)
Charge replenish time: 0 ( 30/22/14/6)
Max charges: 0 ( 3)
Charge replenish time: 0 ( 26/21/16/11)
Max charges: 3
Charge replenish time: 60/50/40/30
Max charges: 0 ( 2)
Charge replenish time: 0 ( 17/15/13/11)
Max charges: 0 ( 2)
Charge replenish time: 0 ( 12)
Max charges: 3 ( 9)
Charge replenish time: 55 ( 41.25)
Max charges: 0 ( 3)
Charge replenish time: 0 ( 60)
Max charges: 0 ( 2)
Charge replenish time: 0 ( 27/24/21/18)
Max charges: 0 ( 3)
Charge replenish time: 0 ( 11)
Max charges: 2
Charge replenish time: 90/80/70 ( 10)
Version history[edit]
- Refresher Orb now replenishes all charges to charged-based abilities.
- Octarine Core now affects the replenish time of charge-based abilities.
Patch history[edit]
- Fixed a bug where the cooldown for charges for Spin Web, Spirit Siphon, Stone Remnant, Fire Remnant and Aghanim's Scepter Demonic Purge was not properly affected by Octarine Core or Arcane Rune.
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