Godzilla, King of the Monsters

Godzilla is power is equal to the number of cards in your and your opponent's deck as it enters the battlefield. Put a +1+0 counter on Godzilla, King of the Monsters. Godzilla's power is equal to the number of cards in your deck + 5. Whenever you attack with a creature you control, your opponent may pay {5}. If they do, Godzilla gains two +1+1 counters. If your opponents does not pay {5}, you win the game.