Challenger's Grace

Repositioning movement that breaks normal movement — either a telegraphed dash across hexes or an instant blink/teleport to a new position, used to close on a target, reposition onto a new one, or escape.

Bonus Attack Speed makes a unit attack more often per second, which means more auto-attack damage and faster mana generation toward the next ability cast. Some carries scale beyond that — their ability itself fires more hits when they have more Attack Speed (e.g., the number of swipes in Aphelios's onslaught). Stacking AS items and traits on these units compounds: faster autos, faster casts, and bigger casts.

Effect fires when a unit secures a kill or assist. An assist counts, so a unit that only contributed damage still triggers it.