Exhaust

Exhaust is a defensive summoner spell aimed at a single enemy champion. It slows their movement speed and reduces the damage they deal for a few seconds, making it a powerful tool for shutting down a fed carry or a diving assassin.

Supports take it most often to peel for their team in fights, but solo laners pick it into hard-hitting opponents to win duels. Unlike pure escape tools, Exhaust is reactive: holding it for the right moment, such as the instant an enemy commits to an all-in, is what makes it effective rather than wasted.