Your projectile divides midflight into three barbs, which thrust two foes toward a third.

Daily   ✦     Primal, Reliable, Weapon
Standard Action      Ranged weapon

Primary Target: One creature

Primary Attack: Wisdom vs. AC

Hit: 2[W] + Wisdom modifier damage.

Effect: Make a secondary attack.

  Secondary Target: One or two creatures that are within 5 squares of the primary target

  Secondary Attack: Wisdom vs. AC

  Hit: 1[W] damage, and you slide the secondary target 5 squares to a square adjacent to the primary target.

Published in Player's Handbook 3, page(s) 121.