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| “ | Play Initializing in... 3..2..1! Click to listen — Tinker Hero Strategy Counters Equipment Gear Responses Sounds Lore Old Abilities Changelogs Tinker 17 + 2.3 13 + 1.2 30 + 2.2 Level Base  | ” |
A cooldown is a period of wait time before a spell, ability, or item power can be used again.
Mechanics
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 Iron Talon Item Changelogs Iron TalonB A simple but effective weapon devised to quell a great Hellbear uprising. Cost500 (125) Bought FromSupport Active Chop Passive Quell Bonus +2 Armor Disassemble? No Alert allies? 
`s cooldown is 4 seconds when cast on a tree, but 20 when on units. 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.
Videos
Cooldown manipulation
Several abilities and items are able to manipulate cooldowns of abilities and items. These include cooldown reductions, which can only occur when the spell is off cooldown first, or cooldown resetting.
Percentage-based cooldown reductions and increases stack multiplicatively with each other. Flat reductions and increases fully stack as well. If both are combined, flat changes are added before percentage changes are. This means, when having percentage cooldown reduction and a flat reduction, the flat reduction is applied first, and then the percentage based change is applied.
Final cooldown formula:
- Final cooldown = (Base cooldown + sum of all flat increases - sum of all flat reductions) ⃗ (1 + first percentage increase) ⃗ (1 + second percentage increase) ⃗ (1 - first percentage reduction) ⃗ (1 - second percentage reduction)
Sources of reduction
- Cooldown Reduction: 30%
Also affects charge replenish times. - Some heroes` upgrades involve reduction of cooldowns.
- Cooldown Reduction: 3/4/5/6
Places a buff on the target for 10 seconds, which reduces the cooldown of its next cast spell. - Cooldown Reduction: 25%
Reduces all cooldowns, including items and passives. Also affects charge replenish times. - Fireblast Cooldown Reduction: 2/4/6
Bloodlust Cooldown Reduction: 5/10/15
Sources of increase
- Duration: 6/8/10/12
Increases the cooldown of spells which are already on cooldown by the given duration. Visually freezes the cooldown display. Does not affect abilities which were cast after Time Dilation, or items.
Sources of resetting
- Resets cooldowns of all spells, except ultimates, for self and the allied hero when upgraded. Does not reset any item cooldowns.
- Does not reset cooldowns of Arcane Boots Item Changelogs Arcane BootsL Magi equipped with these boots are valued in battle. Cost1300 Bought FromSupport Active Replenish Mana Bonus +250 Mana+50 Movement speed Disassemble? Yes Alert allies? Yes Recipe The
, Black King Bar Item Changelogs Black King BarB A powerful staff imbued with the strength of giants. Cost3975 (1375) Bought FromArmor Active Avatar Bonus +10 Strength+24 Attack damage Disassemble? No Alert allies? No Recipe , Bottle Item Changelogs BottleBL An old bottle that survived the ages, the contents placed inside become enchanted. Cost650 Bought FromConsumables Active Regenerate Charges 3 / 1 Passive Store Rune Disassemble? No Alert , Hand of Midas For the character from Dota 2 lore, see Midas. Item Changelogs Hand of MidasB Preserved through unknown magical means, the Hand of Midas is a weapon of greed, sacrificing animals to , Helm of the Dominator Item Old Abilities Changelogs Known Bugs Helm of the DominatorB The powerful headpiece of a dead necromancer. Cost2025 Bought FromArtifacts Active Dominate Passive Dominator Aura Bonus +2 Strength+2 Agility+2 , Linken`s Sphere Item Interactions Old Abilities Changelogs Linken s Sphere This magical sphere once protected one of the most famous heroes in history. Cost4850 (1000) Bought FromArmor Active Transfer Spellblock Passive Spellblock Necronomicon Item Old Abilities Changelogs NecronomiconB Considered the ultimate in necromancy and demonology, a powerful malefic force is locked within its pages. Cost2650 (1200) Bought FromCaster Active Demonic Summoning Bonus +8/12/16 , Pipe of Insight Item Changelogs Pipe of InsightB A powerful artifact of mysterious origin, it creates barriers against magical forces. Cost3200 (800) Bought FromSupport Active Barrier Passive Insight Aura Bonus +8 Health regeneration+30% Magic and Refresher Orb Item Changelogs Refresher OrbB A powerful artifact created for wizards. Cost5200 (1800) Bought FromCaster Active Reset Cooldowns Bonus +12 Health regeneration+250% Mana regeneration+20 Attack damage Disassemble? No Alert allies? No Recipe .
Unaffected by cooldown manipulation
Fade delays before invisibility Invisibility is a status effect which makes units and heroes not appear on their opponent s screen or minimap, and makes them unable to be targeted directly by the enemy. Invisibility makes the unit s model appear 
( Nature`s Guise, Cloak and Dagger) are no cooldowns and therefore cannot be manipulated. The abilities listed below could be categorized as cooldowns in one way or another, but are not affected by cooldown reductions.
- Axe Hero Strategy Counters Equipment Gear Responses Sounds Lore Old Abilities Changelogs Known Bugs Axe 25 + 2.8 20 + 2.2 18 + - Counter HelixCooldown: 0.45/0.4/0.35/0.3
The ability tooltips visually show cooldown reductions, but will not make use of it. - Damage Cooldown: 3
- Brewmaster Hero Strategy Counters Equipment Gear Responses Sounds Lore Old Abilities Changelogs Known Bugs Brewmaster 23 + 3.2 22 + 1.95 14 + - Drunken BrawlerCertain Crit Timer: 13/12/11/10
- Damage Cooldown: 3
- Cooldown: 0.2
- Heal Stack Limit: 25
Mend Heal Stack Limit (38) is manipulated and uses the same modifier. - Cooldown: 0.2
Charges
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 Item Changelogs Octarine CoreS At the core of spellcraft are spectrums only the very gifted can sense. Cost5900 Bought FromCaster Passive Cooldown Reduction, Spell Lifesteal Bonus +25 Intelligence+425 Health+425 Mana Disassemble? 
and Arcane Rune Double Damage Haste Illusion Invisibility Regeneration Bounty Arcane See more: Runes#List Buff icon Arcane Play AbilityNo Target AffectsSelf Reduces cooldowns by 30% and mana costs by 
, and can all be replenished with Refresher Orb Item Changelogs Refresher OrbB A powerful artifact created for wizards. Cost5200 (1800) Bought FromCaster Active Reset Cooldowns Bonus +12 Health regeneration+250% Mana regeneration+20 Attack damage Disassemble? No Alert allies? No Recipe . Other sources of cooldown manipulation cannot grant charges back or affect the recharge times.
Charge-based abilities
The following abilities use the charge system:
- Max Charges: 0 ( 4)
Charge Replenish Time: 0 ( 13/11/9/7) - Max Charges: 0 ( 2)
Charge Replenish Time: 0 ( 40) - Broodmother - Spin WebMax Charges: 1/2/3/4
Charge Replenish Time: 40 - Death Prophet - Spirit SiphonMax Charges: 1/2/3/4
Charge Replenish Time: 45 - Diffusal Blade - PurgeMax Charges: 8
Charges can be reset once by upgrading to Diffusal Blade 2. - Drum of Endurance - EnduranceMax Charges: 6
Charges can be reset by buying the recipe again. - Earth Spirit - Stone RemnantMax Charges: 6
Charge Replenish Time: 30 - Ember Spirit - Fire RemnantMax Charges: 3
Charge Replenish Time: 35 - Gyrocopter - Homing MissileMax Charges: 0 ( 3)
Charge Replenish Time: 0 ( 20/17/14/11) - Outworld Devourer - Astral ImprisonmentMax Charges: 0 ( 2)
Charge Replenish Time: 0 ( 12) - Sniper - ShrapnelMax Charges: 3 ( 7)
Charge Replenish Time: 55 - Shadow Demon - Demonic PurgeMax Charges: 0 ( 3)
Charge Replenish Time: 0 ( 40)
Version history
- Refresher Orb Item Changelogs Refresher OrbB A powerful artifact created for wizards. Cost5200 (1800) Bought FromCaster Active Reset Cooldowns Bonus +12 Health regeneration+250% Mana regeneration+20 Attack damage Disassemble? No Alert allies? No Recipe now replenishes all charges to charged-based abilities.
- Octarine Core Item Changelogs Octarine CoreS At the core of spellcraft are spectrums only the very gifted can sense. Cost5900 Bought FromCaster Passive Cooldown Reduction, Spell Lifesteal Bonus +25 Intelligence+425 Health+425 Mana Disassemble? now affects the replenish time of charge-based abilities.
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