Kill Them All is an utility power available to the Barbarian class at level 16.[Dr386:50]
Kill Them All
Barbarian Utility 16
Close burst 3
Special: Thaneborn Triumph: The burst equals 1 + your Charisma modifier.
Trigger: You reduce an enemy to 0 hit points or fewer
Target: Each ally in burst that can hear you.
Effect: The target gains a +2 power bonus to attack rolls and deals 1d6 extra damage on melee and ranged attacks until the end of your next turn.