Blood for Blood

Cost: 2295 Health
Target: Enemy
Maximum range: 5 meters
Effect
Rend an enemy, dealing 2323 Magic Damage. Deals up to 75% more damage based on your missing Health. After you cast this ability, you cannot be healed by allies for 5 seconds.
New effect
Costs Health to cast, but greatly increases the execute scaling. After casting the ability, you cannot be healed by allies for a short duration.