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 enough damage from the rear, he releases a Quill Spray of the current level.

Coughs a quill-packed hairball towards the target location. Erupts at the location, hitting enemies with Viscous Nasal Goo stacks and Quill Spray.

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

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