أوروبوروس، حيوان الفائق الكمومي الآلي

2 Level 4 monsters
Cannot attack unless it has Xyz Material. Once per turn: You can detach 1 Xyz Material from this card, then target 1 other face-up monster on the field; change it to face-down Defense Position. This effect can be activated during either player's turn, if this card has "Super Quantum Green Layer" as Xyz Material. Once per turn: You can attach 1 "Super Quantum" monster from your hand or field to this card as an Xyz Material.