Blade Whirlwind is an encounter power available to Barbarians at level 13. [PH2:56]
Blade Whirlwind
Barbarian Attack 13
Driven by strength and will, your weapon sweeps in a mighty arc that cuts every foe around you and drives them back from your fury.
Close burst 1
Target: each enemy in burst that you can see
Attack: Strength vs AC.
Hit: 2[W] + Strength modifier damage.
Rageblood Vigor You also push the target hit by this attack 1 square.