All buffs and debuffs

Debuff

Sleep

The Champion with this debuff is unable to act X Turns. Cooldowns are not refreshed while Sleep is active. Continuous Heal, Poisons, and HP Burn work as normal while the Champion is asleep, so do any Passive Skills that heal the Champion.

This debuff can be removed from the target by inflicting any kind of active damage (except the turn when the Sleep debuff was placed).

What the game's own status effects screen says

In the game data this effect appears as Sleep.

Champions that apply it

45 champions have a skill that applies Sleep, 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.