This unassuming pebble appears to momentarily duplicate itself in your hand, or to vanish altogether for a few seconds at a time.
Consumable 200 gp
Power Consumable Utility (Standard Action)
Effect: You throw the stone at yourself or a willing creature within 10 squares of you. The creature is removed from play until the end of 1d4 of its turns. At that point, the creature reappears in the space from which it vanished or the nearest unoccupied space.
Published in Dragon Magazine 430.