
Passive
Deadly Venom
Twitch's basic attacks infect the target %i:OnHit% On-Hit, dealing true damage each second.

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Riot Data Dragon 16.20.1. Base values before items, runes and bonuses; independent of match-data filters.
Base-game reference only. Mode-specific balance changes and augments are not included.
Official short descriptions · Data Dragon 16.20.1
Base-game reference only. Item, rune and mode-specific adjustments are not included.
This reference covers the passive and four ability slots. Alternate forms and full damage calculations are not covered.

Passive
Twitch's basic attacks infect the target %i:OnHit% On-Hit, dealing true damage each second.

Q
Twitch becomes Camouflaged for a short duration and gains Move Speed. When leaving Camouflage, Twitch gains Attack Speed for a short duration. When an enemy champion with Deadly Venom dies, Ambush's cooldown is reset.
Base values from ability rank 1 upward.

W
Twitch hurls a cask of venom that explodes in an area, slowing targets and applying deadly venom to the target.
Base values from ability rank 1 upward.

E
Twitch wreaks further havoc on poisoned enemies with a blast of his vile diseases.
Base values from ability rank 1 upward.

R
Twitch unleashes the full power of his crossbow, shooting bolts over a great distance that pierce all enemies caught in their path.
Base values from ability rank 1 upward.