RaidCodex
All buffs and debuffs

Debuff

Poison

Damages the target Champion by 2,5% or 5% of their MAX HP at the beginning of their Turn. This damage is not affected by any other effects except Poison Sensitivity debuff, and only scales per Target’s MAX HP. Block Damage blocks it. If the Target Champion has a Shield, Poison damage will be applied to the Shield first.

What the game's own status effects screen says

In the game data this effect appears as ContinuousDamage5p, ContinuousDamage025p.

Champions that apply it

97 champions have a skill that applies Poison, according to the effect lines in the game data. This lists who applies it, not how reliably: chance, duration and resistance are on each champion's page.

The description is the game's own text. It has not been tested in battle here, and the game's wording can be loose (for example about numbers that differ between versions of an effect). See Data quality for what has and has not been checked. Found a mistake? Use "Report a problem" at the bottom of the page.