B.E.S. Big Core MK-2

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