one piece tcg: two legends - booster box Amazon.com: Card Game OP-08 - 24 Packs of 6 Cards Big Mom Pirates as purple BANDAI HOBBY, One Piece TCG

Soulflayer uses the delve mechanic and while it is true that BB for a 4/4 is pretty good, when you consider that you have to invest your graveyard, which is likely a resource for other cards in your deck, its not actually that great an investment

When Lumra enters, mill four cards

(A creature with decayed can't block

That is why, when looking at high-value cards on Japanese flea markets, risk management becomes more important than with regular cards

It commonly goes with commanders like Krark, the Thumbless or Vial Smasher the Fierce that have strong triggered abilities to double, but most decks are happy to have access to blue