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Tenacity icon.png Tenacity (or Crowd Control Reduction) is a stat that reduces the duration of all incoming Stun icon.png crowd control status effects except Airborne icon.png airborne, Drowsy icon.png drowsy, Kinematics icon.png kinematics, Nearsight icon.png nearsight, Stasis icon.png stasis, and Suppression icon.png suppression. The stat is the percentage by which the duration is reduced. This reduction is limited, the duration can never drop below 0.5 seconds. The duration of the crowd control is calculated at the time of application and does not change if the tenacity changes.

Increasing tenacity

Tenacity can be increased with champion abilities, items, runes, and summoner spells, stacking either Multiple stacking icon.png multiplicatively or Additive stacking icon.png additively depending on the combination of the effects.

Items

Elixirs

Champion abilities

Runes

Summoner Spells

Game Modes

Stacking

These are the combinations that stack additively:

All the other combinations stack multiplicatively.

Reducing Tenacity

Tenacity can be reduced to negative values, causing crowd control to last longer.

Champion Abilities

Monsters

  • Rift Scuttler Rift Scuttler has -100% tenacity, doubling the duration of crowd control effects applied to her. This stacks additively with Brittle icon.png Brittle for a total of -130% tenacity.

Trivia


Last updated: November 20, 2019, patch V9.23

1 - ((1 - (0.6 0.6 + 0.15 0.15)) × (1 - (0.25 0.25 + 0.2 0.2)) × (1 - 0.3 0.3) × (1 - (0.3 0.3 + 0.3 0.3)) × (1 - 0.65 0.65) = 
1 - (0.25 × 0.55 × 0.7 × 0.4 × 0.35) = 98.652%
  • With this amount of tenacity, Nasus' Nasus' Wither Wither (longest crowd control in the game) would only last 0.067 seconds. The minimum crowd control duration prevents this.
  • Note that this amount of tenacity can only be achieved briefly with Courage Courage wearing off almost immediately, and with Cleanse Cleanse and Sterak's Gage Sterak's Gage which grant a temporary buff.
  • With the Ultra Rapid Fire buff enabled, the maximum tenacity achievable is 98.989%.
1 - (0.25 × 0.55 × 0.7 × 0.4 × 0.35 × 0.75) = 98.989%
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