Ways to Play One Piece is mostly played as a Constructed game in which players build their own decks from their own collection of cards, adhering to deckbuilding restrictions (50 cards in deck, match the color of the leader, etc.)
This means the creature needs to have at least one power
A 1/2 deathtouch creature for one is already pretty close
Donquixote Doflamingo, Alternate Art Leader, OP04-019 ($58) The number three spot on the list of our most valuable One Piece OP-04 cards goes to a variant of the Donquixote Doflamingo Leader card
Though it costs a hefty seven mana to cast, since it's often played in a control deck, it is fairly easy to survive long enough to cast it
Estimated pull rate is roughly 1 per 100 cartons (1,000 boxes)