Wizard Utility 16Clever Escape

As your foes close in for the kill, you buy time for escape with a cunningly crafted duplicate of yourself.

Daily        Arcane, Illusion, Teleportation
Minor Action      Personal

Effect: You become invisible and teleport 6 squares. You leave behind an illusory image of yourself in the space you occupied. The illusion stands in place, takes no actions, and uses your defenses if it is attacked. It lasts until the end of the encounter or until it is touched or hit by an attack. Your invisibility lasts until the end of your next turn or until you make an attack roll.
A creature can recognize the illusion by making a successful Insight check (DC 15 + one-half your level + your Intelligence modifier).

Published in Arcane Power, page(s) 109.