High Forest Scout Attack 20Binding Arrows

Your arrows suddenly sprout vines and roots after they strike, latching onto nearby trees and burrowing into the earth at your enemy’s feet.

Daily        Arcane, Weapon, Zone
Standard Action      Ranged weapon

Target: One, two, or three creatures and/or unoccupied squares

Attack: Dexterity vs. Reflex (or Dexterity vs. 10 if square is unoccupied), one attack per target

Hit: If a creature is hit: 3[W] + Dexterity modifier damage, and the target is slowed (save ends).
    If a square is hit: Creates a 1-square-radius zone centered on the square until the end of the encounter. A creature passing through the zone or starting its turn in the zone is slowed until the end of its turn.

Published in Forgotten Realms Player's Guide, page(s) 57.