Butcher's Feast is an encounter power available to the Barbarian class at level 27.[PH2:60]
Butcher's Feast
Barbarian Attack 27
Melee weapon
Target: one creature
Attack: Strength vs AC
Hit: 6[W] + Strength modifier damage. Until the end of your next turn, you can make a melee basic attack as a free action against any enemy adjacent to you that hits or misses you.
Thaneborn Triumph: Until the end of your next turn, you gain a power bonus to basic attack rolls equal to your Charisma modifier.