سـ.ا.ب. النواة الكبيرة ام-كي-2

If you control no monsters, you can Normal Summon this card without Tributing. When this card is Special Summoned, place 3 counters on it. This card cannot be destroyed by battle. If this card attacks or is attacked, remove 1 counter from this card at the end of the Damage Step. If you cannot, destroy it.