A well-placed shot creates an opening for a follow-up attack that knocks your foe prone.

Encounter   ✦     Arcane, Psychic, Weapon
Standard Action      Ranged weapon

Target: One Creature

Attack: Charisma vs. Will

Hit: 2[W] + Charisma modifier psychic damage. The next time the target is hit by an attack before the end of your next turn, it is knocked prone.

Published in Arcane Power, page(s) 8.