Once per turn, during the Battle Phase: You can activate 1 of these effects. ●Target 1 "Ghostrick" monster you control; change that target to face-down Defense Position, and if you do, change 1 face-down Defense Position monster your opponent controls to face-up Attack Position. ●Target 1 face-down Defense Position monster you control; change that target to face-up Attack Position, and if it is a "Ghostrick" monster, change 1 face-up monster your opponent controls to face-down Defense Position.