make your own yugioh card sleeves New Game Matte Plastic Premium Custom Card Sleeves A pack of standard sized customized sleeves contains 100 sleeves VEHASAYO Custom Holographic Card Sleeves,

Indistinguishable on the back [edit] The main issue to guarantee fair play in a card game is that all cards in the deck must be indistinguishable for any player who does not view the front side (if card sleeves are used, the term 'card' means the sleeve with the card inside)

Basically every top deck in the format runs green or red, so Flashfreeze is a great way to maximize your valuable sideboard slots

Your Mono-Black deck having issues with Esikas Chariot

Forgotten Cellar is fine as a more expensive Yawgmoths Will, but I see players leaning into Walk-In Closet heavily within decks that utilize the graveyard and want to Ramp