one piece card game op 06 OP-06 Booster Box (Japanese) from Germa 66 ONE PIECE CARD GAME OP06-007

The flashback is a little expensive, but 3 mana to create a copy token at instant speed is a good rate

My goals were to make sure the set did a good job of representing this corner of the Marvel Universe and make sure every design choice was as flavorful as possible while supporting great gameplay

That is what allows it to be a commander after all, as clarified by Wizards of the Coast in a rulings update

Result: Infinite storm, infinite mana, infinite enters/leaves the battlefield and graveyard triggers

Cards like Massacre Wurm, Elesh Norn, Grand Cenobite, and Ascendant Evincar are perfect because they're asymmetrical