Mirror Resonator

Effect

If your opponent controls a face-up monster(s) that was Special Summoned from the Extra Deck and you do not, while this card is in your hand or GY: You can Special Summon this card, but banish it when it leaves the field. You can only use this effect of "Mirror Resonator" once per turn. Once per turn: You can target 1 face-up monster your opponent controls; treat this card's Level as that monster's original Level if this card is used for a Synchro Summon this turn.