Bristleback

Covers a target in snot, causing it to have reduced armor and movement speed for 5 seconds. Multiple casts stack and refresh the duration.

Sprays enemy units with quills dealing damage in an area of effect around Bristleback. Deals bonus damage for every time a unit was hit by Quill Spray in the last 14 seconds.

Bristleback takes less damage if hit on the sides or rear. If Bristleback takes 275 damage from the rear, he releases a Quill Spray of the current level.

Bristleback works himself up into a fury every time he casts a spell, increasing his movement speed and damage.

Bristleback has 10% damage and debuff duration amp against enemy heroes that are behind him.