Tenacity (or Crowd Control Reduction) is a stat that reduces the duration of all crowd control effects except Suppression icon suppression, Stasis icon stasis, and Airborne icon displacements. Tenacity can be increased with champion abilities, items, runes, and summoner spells. Tenacity can stack both multiplicatively and additively, depending on the combination of the effects.

Increasing tenacity

The following game elements increase tenacity:



Champion abilities

  • Dr. MundoSquare Dr. Mundo's Burning Agony Burning Agony grants him 10 / 15 / 20 / 25 / 30% tenacity while toggled on.
  • GarenSquare Garen's Courage Courage grants him 60% tenacity for the first 0.75 seconds.
  • IreliaSquare Irelia's Ionian Fervor Ionian Fervor grants her tenacity based on if she is outnumbered or not. If she has the number's advantage she gains 0% tenacity, if it is an even fight she gains 10% tenacity, and if she's outnumbered she gains 25 / 30 / 35 / 40% tenacity.


Summoner Spells

Game Modes


These are the combinations that stack additively:

All the other combinations stack multiplicatively.

Reducing Tenacity

OrnnSquare Ornn's Bellows Breath Bellows Breath and Call of the Forge God Call of the Forge God apply Brittle icon Brittle to an enemy. Enemies can have up to 2 marks of Brittle icon Brittle. Each mark reduces the target's tenacity by 30%, in other words, it increases the duration of incoming Crowd Control by 30% (including Airborne icon Airborne effects).


Last updated: November 28, 2017, patch V7.23

Note: Elixir of Iron item Elixir of Iron and Travel Size Elixir of Iron item Travel Size Elixir of Iron stack additively.
1 - ((Cleanse 1 - 0.65) × (Courage 1 - 0.6) × (1 - (Elixir of Iron item 0.25 + Travel Size Elixir of Iron item 0.25)) × (Moonflair Spellblade item 1 - 0.35) × (Sterak's Gage item 1 - 0.3) × (Unflinching rune 1 - 0.2) × (Unflinching rune 1 - 0.15)) = 98.267%
  • With this amount of tenacity, the longest crowd control in the game NasusSquare Nasus' Wither Wither, which usually lasts 5 seconds, will only last 0.09 seconds.
    • In comparison, a champion targeted by NasusSquare Nasus' Wither Wither, with 2 Brittle stacks (-60% tenacity), will be slowed for 8 seconds.
  • Note that this amount of tenacity can only be achieved briefly, with the effects of Cleanse Cleanse, Unflinching rune Unflinching, and Courage Courage wearing off almost immediately.
  • With the Ultra Rapid Fire buff enabled, the maximum tenacity achievable is 98.701%