Ash Hammer Rage is a daily power available to the Barbarian class at level 25.[PH2:59]
Ash Hammer Rage
Barbarian Attack 25
Melee weapon
Target: one creature
Attack: Strength vs AC
Hit: 7[W] + Strength modifier damage, and you push that target a number of squares equal to your Constitution modifier.
Miss: half damage, and you push the target 1 square.
Effect: You enter the rage of the ash hammer. Until the rage ends, whenever you hit with an attack, you gain temporary hit points equal to 10 + you Charisma modifier. If the attack already grants temporary hit points, add your Charisma modifier to the temporary hit points you gain.