one piece decks tcg The Seven Warlords of The Sea Starter Deck constructed cards BANDAI NAMCO Entertainment ONE Piece

Let's start off by having some comparison in card value

The spell or ability that constituted a crime doesn't have to have resolved yet or at all

It seems like Mardu just might be legit

Not only will this card see play in Grixis Affinity though, but I can also see this springing up new Black based Affinity deck or maybe being a part of a Rack style of discard/lockout strategy

Instead, I would try something like: This permanent wont untap during its current controllers next untap step. That one extra word, current, while seemingly redundant, would actually save a lot of hassle, and would make sure that Exert wouldnt functionally change