Your projectile dissolves into a blast of sand that lodges in your opponents' eyes, causing unendurable fatigue.

Daily   ✦     Primal, Sleep, Weapon
Standard Action      Area burst 2 within weapon range

Target: Each enemy in the burst

Attack: Wisdom vs. Fortitude

Hit: The target is dazed (save ends).

  First Failed Saving Throw: The target is unconscious instead of dazed (save ends).

Miss: The target is dazed (save ends).

Published in Player's Handbook 3, page(s) 125.