Ret-time Reviver Emit-ter #MP21-EN160

DarkMonster

If this card is in your hand or GY: You can target 1 face-up monster on each field; change them to face-down Defense Position, and if you do, Special Summon this card, but banish it when it leaves the field. You can only use this effect of "Ret-time Reviver Emit-ter" once per turn.