Tenacity

Tenacity (or Crowd Control Reduction) is a stat that reduces the duration of all crowd control effects at the exception of, , and. Tenacity can be obtained through champion abilities, items, runes, and summoner spells. All tenacity stacks multiplicatively, other than items' which stack additively.

Champion abilities

 * grants him % tenacity while toggled on.
 * grants him 60% tenacity for the first seconds.
 * 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 % tenacity.

Reducing Tenacity
Brittle is a status effect that can be applied by and. Enemies can have up to 2 marks of Brittle.

Each mark reduces the target's tenacity by 30% or in other words, increases the duration of incoming Crowd Control by 30% (including effects).

Trivia

 * Until patch V1.0.0.118, Tenacity was an unnamed effect unique to . In the aforementioned patch, the effect was promoted into a champion statistic and three additional items were added: (removed item),  (removed item) and . Tenacity from multiple sources did not stack, similar to . With the Season Three item overhaul and the introduction of named item effects, Tenacity was reverted to an item effect. In V3.01, all sources of crowd control reduction were changed to say "Tenacity" and Tenacity was reintroduced as a champion statistic.
 * Until Season Three, Tenacity's in-game icon was the same as the icon used for and  passive. Between the introduction of season 3 changes and V3.01, it shared the same icon as the  mastery. As of V3.01, it no longer has an icon in the buff bar.

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


 * The biggest amount of tenacity you can obtain is % with.
 * (+65% tenacity)
 * (+60% tenacity)
 * + (+50% tenacity)
 * (+35% tenacity)
 * (+30% tenacity)
 * (+20% tenacity passive) (+15% tenacity active)


 * Note: and  stack additively.


 * 1 - ((1 - ( + )))%


 * With this amount of tenacity, the longest crowd control in the game, which usually lasts 5 seconds, will only last seconds.
 * In comparison, a champion targeted by, with 2 Brittle stacks (-60% tenacity), will be slowed for 8 seconds.
 * With the Ultra Rapid Fire buff enabled, the maximum tenacity achievable is %