Creatures that enter the battlefield or become creatures later in the turn won't get -1/-1 unless the delayed triggered ability triggers and resolves again later
Just like Supporter cards, each player can only play one Stadium card during their turn
Q : You described your own style as faking it in the past, didnt you
Once Costume Closet runs out of +1/+1 counters, it remains on the battlefield
It's a classic Commander card in that if a player really wants to roll the dice and not let you draw a card, they could get extremely lucky, and you mill lands off the top of your deck, but if you just so happen to send some high-value cards to the graveyard, your opponent is going to be hit for massive life damage out of nowhere
The trap card Yummy Redemption lowers the ATK of all of the opponent's monsters by 200 for each LIGHT Beast on your field and in your GY