one piece booster box 01 Premium Booster Acrylic Case – UV-Resistant, Magnetic Lid Numerous parallel cards with different illustrations One Piece Cards Collection Starter

Given the initial intention and scope of the project, these are unlikely to be easy or at all possible to implement in the future

Replace Underground Sea with something like an Ice Tunnel , which also has the land types that make Underground Sea so good, but enters taps to temper things a bit

If the creatures in the log are attacking multiple defending players, those players declare their blocks in turn order

Whenever a creature enters the battlefield under your control, check its power and toughness against the power and toughness of the creature with evolve

They're still lands

I went a little more for flavor, sticking to the morph creature theme and slipping in some Doctor Who cards as relevant