Voracious Predate Rage is a daily power available to the Barbarian class at level 19.[PrP:20]
Voracious Predator Rage
Barbarian Attack 19
You swing mightily, and spirit predators arise, empowering your blows whenever you leave an enemy's body in your wake.
Melee weapon
Target: one creature
Attack: Strength vs AC
Hit: 4[W] + Strength modifier damage. If the target is already bloodied, the attack deals 1[W] extra damage.
Miss: half damage.
Effect: You enter the rage of the voracious predator. Until the rage ends, when you reduce any enemy to 0 hit points with an attack, you gain a +2 power bonus to your next weapon attack roll and that next attack deals 1[W] extra damage if it hits.