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Exhaust is a targeted Summoner spell that affects enemy champions. It reduces damage dealt by 40% and reduces attack speed and movement speed by 30%.


Exhaust is an extremely powerful tool for disabling champions who mainly autoattack, as well as any champion that can deal a high amount of damage. When your team is chasing an enemy and he or she is getting away, using Exhaust on him will help your team gain the upper hand. Using it against enemies when escaping can help you as their movement speed will be decreased.


  • Exhaust will not reduce true damage.
  • Since V1.0.0.129, Cleanse Cleanse will remove Exhaust Exhaust's effects.
  • Using Exhaust on a champion when the target is already affected by that spell will reapply the effect, resetting its duration. It will NOT increase the effect.

Patch History


  • Damage reduction reduced to 40%, down from 50%.
  • Now reduces the target's armor and magic resistance by 10.


  • Visuals changed to improve clarity.


  • Bugfix: Fixed a bug where Exhaust did not grant assists when used against slow immune targets (who are still affected by the damage reduction effect).


  • Attack speed reduction reduced to 30%, down from 50%.
  • Damage reduction increased to 50%, up from 30%.
  • Range increased to 650, up from 550.


  • Now reduces attack speed by 50%.
  • Movement speed reduction reduced to 30% from 40%.
  • Now reduces all damage dealt by 30% from 70% for attacks and 30% from abilities/items.


  • Cleanse Cleanse now cleanses summoner spell debuffs such as Exhaust Exhaust's movement speed and damage reduction and Ignite Ignite's damage over time.
  • Duration reduced to 2.5 seconds from 3 seconds.
  • Improved Exhaust no longer increases the duration.


  • Fixed a bug where Exhaust Exhaust was slowing the target additively rather than multiplicatively.


  • Exhaust Exhaust now reduces (auto/basic) attack damage by 70% and ability/item damage by 35% instead of blinding for the duration.


  • Exhaust Exhaust is now properly flagged as a slow + blind and can now be removed by Cleanse Cleanse.


  • Exhaust Exhaust now removes stealth when used.


  • Exhaust Exhaust is now split into two buffs: Exhaust Slow and Exhaust (Blind). Highlander Highlander should no longer dispel blind.


  • Exhaust Exhaust can now be removed by abilities that remove slow.


  • Cooldown reduced to 210 seconds from 240.


  • Reduced cooldown to 240 seconds form 270.

May 23, 2009 Patch:

  • Reduced slow percentage to 40% from 50%.

May 1, 2009 Patch: Remake

  • Exhaust Exhaust no longer silences, it now blinds the target (100% miss chance).

April 25, 2009 Patch:

  • Reduced cast range to 550 from 650.

April 11, 2009 Patch:

  • Duration reduced by 1 second.
  • Cooldown increased to 4.5 from 4 minutes.
  • Slow percent increased to 50% from 40%.

Alpha Week 4:

  • Exhaust Exhaust cooldown decreased to 4 minutes from 5.


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