The numbers arrayed against you mean nothing. You swing your weapon in a great arc, stopped by nothing so trivial as flesh and bone.

Encounter   ✦     Primal, Weapon
Standard Action      Close burst 1

Target: Each enemy in the burst you can see

Attack: Strength vs. AC

Hit: 1[W] + Strength modifier damage + 1 damage for each enemy adjacent to you.

Published in Player's Handbook 2, page(s) 51.