the best one piece booster box Trading Card Game PRB-02 Japanese Sealed – Calipokehouse and there are even some rare parallel edition DON One Piece TCG: The Best

Duggan wont solve the lack of interaction in Deep Sea Clues, but he does give you a bit of removal along with a creature that fits your plan

The channel one will channel for three mana and act as a Mana Leak for three mana or counter any spell or ability, so it's one mana more, and you can just cast this as a seven mana 5/7 Crab with ward 3 a bit behind the curve, but a nice free option

The Ghost of Ramirez DePietro is certainly going to make a showing here, even if we dont do too much with discard

Sorcery Color tag templates(None) Cultivate Search your library for up to two basic land cards, reveal those cards, put one onto the battlefield tapped and the other into your hand, then shuffle