a4 plastic sleeves for cards 3" x 4" Card Sleeves,42 Count Baseball Card Protectors, Sports Card You can put two cards in one sleeve 3"X4" Card Sleeves Top Loaders

You can feed all this mana into generic mana costs, X-spell costs, or, with Chromatic Orrery out, use it to cast whatever you like

Black Whirlwind Id say Black Whirlwind took Blackwings from being an okay deck, right up to an almost overpowered one

This card gains 500 ATK for each Level 4 or higher monster you control

I think this deck has a solid legacy, one that represents the better parts of modern commander decks

Spiritually, this makes sense, but mechanically, there's just no color differentiation between a Polluted DeltaPolluted Delta and a Misty RainforestMisty Rainforest, despite there being an actual color palette on the card representing the colors of lands it can go get