You expend one of your life sparks to fashion an effigy of the creature whose spark you've just released.

Daily   ✦     Arcane
Minor Action      Ranged 10

Effect: Expend a life spark you possess. Place the creature from which you received that life spark back in the encounter within the power's range. It has 10 hit points and acts on your next turn with a full set of actions as an independent creature that you control. The creature can do nothing except make basic attacks and move. It drops to 0 hit points again, dies, and fades away at the end of your next turn.

Published in Player's Handbook, page(s) 142, Class Compendium.