Your attack causes vines to twist around your foe. They don't let go until it has felt pain.

Daily   ✦     Primal, Weapon
Standard Action      Ranged weapon

Target: One creature

Attack: Wisdom vs. AC

Hit: 1[W] + 3d8 + Wisdom modifier damage. The target is then immobilized until it has taken at least 10 damage.

Miss: Half damage, and the target is immobilized until the end of your next turn.

Published in Player's Handbook 3, page(s) 126.