2 Level 4 monsters During the Standby Phase: You can detach 1 material from this card, then target 1 "Time Thief" monster in your GY, except "Time Thief Perpetua"; Special Summon that monster. (Quick Effect): You can target 1 other Xyz Monster you control; attach 1 "Time Thief" card from your Deck to it as material. You can only use each effect of "Time Thief Perpetua" once per turn.