Aatrox Ability (LoL): Umbral Dash

Aatrox heals for 20 / 22.5 / 25 / 27.5 / 30% of the premitigation-physical damage he deals, with a 15% effectiveness against non-champions.

Additionally, Aatrox stores a Umbral Dash charge every 24 / 20 / 16 / 12 / 8 seconds, up to 2 stored at once.

Aatrox dashes in the target direction, gaining 15 / 25 / 35 / 45 / 55 bonus attack damage for 1.5 seconds.

Umbral Dash can be cast during his other spellcasts without interrupting them.