During the Main Phase, if your opponent Normal or Special Summoned 5 or more monsters this turn (Quick Effect): You can Tribute as many face-up monsters on the field as possible, and if you do, Special Summon this card from your hand, then Special Summon 1 Primal Being Token (Rock LIGHT Level 11 ATK ? DEF ?) to your opponent s field. (This Token s ATK DEF become the combined original ATK DEF of the Tributed monsters.) You can only use this effect of Nibiru, the Primal Being once per turn.