one piece base set booster box Deluxe Acrylic Case Compatible with English OP-04 and Newer Boxes | Magnetic Easy Top Loading featuring a variety of cards from the One Piece universe One Piece: Romance Dawn Booster

They're typically green in color

Adaptational Expansion: The series is set to expand on the lore of each archetype featured from the game itself

Adding traits that each digimon has, such as dragon or holy knight, would be nice

You play a creature card that becomes one creature permanent, so you leave the card in play to represent that creatures status

Cardguard Strategy Sleeves from UltraPro The next step up the rung is Cardguard Strategy Sleeves

One way you can do this is by using them as tuners for a synchro summon next turn, allowing you to bring out some seriously powerful monsters to beat your opponent with