Slashing Tornado Rage is a daily power available to the Barbarian class at level 15.[Dr384:39]
Slashing Tornado Rage
Barbarian Attack 15
Close burst 2
Requirement: You must be wielding a two-handed reach weapon.
Target: each enemy you can see in the burst.
Attack: Strength vs AC
Hit: 1[W] + Strength modifier damage and the target takes ongoing 5 damage (save ends)
Miss: half damage.
Effect: You enter the rage of the slashing tornado. Until the rage ends, at the start of each of our turn, deal damage equal to your Constitution modifier to each enemy within 2 squares of you.