Hail of Blades

Gain 90% (60% for ranged champions) Attack Speed and bonus true damage when you attack an enemy champion for up to 3 attacks. No more than 3s can elapse between attacks or this effect will end. Cooldown: 10s. On-Hit Damage: 2 - 20 (+0.12 bonus AD, +0.1 AP) damage. Attack resets increase the attack limit by 1. Allows you to temporarily exceed the Attack Speed limit.

Tree

Domination

Row

Keystone

In short

Gain a large amount of Attack Speed and bonus true damage for the first 3 attacks made against enemy champions.

Patch

16.16.1