Longstrike Slayer Rage is a daily power available to the Barbarian class at level 5.[Dr384:39]
Longstrike Slayer Rage
Barbarian Attack 5
Close burst 2
Requirement: You must be wielding a two-handed reach weapon
Target: Each enemy you can see and is not adjacent to you
Attack: Strength vs AC
Hit: 1[W] + Strength modifier + Constitution modifier damage.
Miss: half damage.
Effect: You enter the rage of the longstrike slayer. Until the rage ends, you gain a power bonus equal to your Constitution modifier to melee and close weapon damage rolls against targets that are 2 or more squares away from you.