With a wave of the hand, this shot's arcane energy can change an enemy's future.

Encounter   ✦     Arcane, Weapon
Standard Action      Ranged weapon

Target: One creature

Attack: Charisma vs. AC

Hit: 1[W] + Charisma modifier damage, and you roll a d20. Until the end of your next turn, you can replace an ally's attack roll against the target with your d20 roll or replace the target's attack roll with your d20 roll as a free action.

Published in Arcane Power, page(s) 10.