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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. The duration cannot be reduced below 0.3 − 0.625 seconds (based on when the game adds / removes the buff). 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

Reducing Tenacity

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

Champion Abilities

Items

  • Anathema's Chains Anathema's Chains reduces the Nemesis' tenacity by 20% while at maximum stacks of Vendetta. This stacks multiplicatively with Brittle icon.png Brittle for a total of -56% tenacity.

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.

Stacking

The tenacity stat is build up from sub-stats that internally are referred to as "modifiers". For the lack of naming scheme, the LoL Wiki simply refers to these as types, from A to E. Combination of effects in the same type will stack additively, while combination of multiple types will stack multiplicatively.

The mathematics regarding the total tenacity is as follows:

1 - (1 - (A1 + A2 + ...))  ×  (1 - (B1 + B2 + ...))  ×  (1 - (C1 + C2 + ...))  ×  (1 - (D1 + D2 + ...))  ×  (1 - (E1 + E2 + ...))

Source
Type A
Type B
Type C
Type D
Type E

For instance, a champion owns Mercury's Treads Mercury's Treads and has Legend: Tenacity Legend: Tenacity at maximum stacks, and a nearby enemy champion affects them with Anathema's Chains' Anathema's Chains' tenacity reduction. The sum of their tenacity is calculated as follows:

  • Type A Tenacity modifiers = 30% 30% + -20% -20%
  • Type E Tenacity modifier = 30% 30%
  • Final Tenacity = 1 - (1 - Mercury's Treads item.png Anathema's Chains item.png Type A Tenacity modifier)  ×  (1 - Legend- Tenacity rune.png Type E Tenacity modifier)
    • = 1 - (1 - (0.3 0.3 + -0.2 -0.2)) × (1 - 0.3 0.3)
    • = 1 - (0.9) × (0.7)
    • = 1 - 0.63 = 0.37 = 37%

Trivia


Last updated: June 24, 2021, patch V11.13

1 - ((1 - 0.6 0.6) × (1 - (0.3 0.3 + 0.4 0.4)) × (1 - (0.05 × 4 0.05 × 4 + 0.25 0.25 + 0.3 0.3)) × (1 - 0.65 0.65) × (1 - 0.3 0.3) = 
1 - (0.4 × 0.3 × 0.25 × 0.35 × 0.7) = 99.265%
  • With this amount of tenacity, Nasus' Nasus' Wither Wither (longest crowd control in the game) would only last 0.03675 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 Silvermere Dawn Silvermere Dawn which grant a temporary buff.
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