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Moving target
rogue attack 29

Daily ✦ martial

Requirement: wielding a crossbow, a light blade, or a sling.
Trigger: A creature makes a melee attack or a ranged attack against you

Target: the attacking creature

Attack: Charisma vs. Will

Hit: "Instead of attacking you, the target attacks a creature you choose within 2 squares of you. You must choose a creature that the target can attack."

Miss: "The target’s attack is made against you as normal, but deals half damage if it hits."[PH:126]

Moving target is a daily power available to rogues at 29th level.