Tier 5 (Hero Level 13)
Ruthless Onslaught deals bonus damage to Heroes equal to 10% of their maximum Health.
Patch changes[]
(Patch October 6, 2015) Note: Bonus damage changed from 15% of the target’s current Health to 10% of the target’s maximum Health.
(Patch August 18, 2015) Note: The Butcher’s Savage Charge Talent will now properly apply its damage bonus when using Ruthless Onslaught on an enemy Hero that has less than 50% Health remaining.