Drives Bloodseeker into a bloodthirsty rage which causes him to attack faster and deal more spell damage at the cost of a percentage of his health per second. Provides half attack speed to allied heroes.

Bloodseeker baptizes an area in sacred blood. After 2.9 seconds the ritual completes, causing any enemies caught in the area to take damage and become silenced.

Bloodseeker is invigorated by the wounds of his enemies, restoring some life when he kills a unit. Restores for half values when denying, or if an ally kills a nearby enemy hero. Also gains bonus movement speed when an enemy hero's health falls below 80%, with the bonuses increasing as their health falls further. If an enemy hero's health falls below 25%, he will also gain vision and True Sight of that hero. Bonuses stack per hero. Unlocks max movement speed for Bloodseeker.

Causes an enemy unit's skin to rupture, dealing initial damage based on its current health. If the unit moves, it takes damage based on the distance moved.