Lethal Tempo Rune League of Legends 2025

Attacking an enemy champion grants a stack of Lethal Tempo for 6 seconds, up to 6 stacks.

Each stack grants 5% Melee / 4% Ranged Attack Speed.

At max stacks, attacks also fire a note that deals 9-30 Melee / 6-24 Ranged, increased by 1% per 1% bonus Attack Speed, as bonus adaptive damage.