To know which One Piece cards are good, check the rarity, competitive usage, and synergy with popular leaders
The spellslinger archetype has plenty of depths, with token decks, burn decks, and storm decks all comfortably falling within the limitations of extracting the most value from your instants and sorceries (with some modern cards including other noncreature spells), so theres a little something for everybody
The main goal of this deck is to get your Phoenix Gearfrieds into the graveyard and then use chevalier and supervise along with other equip cards to clear your opponents field while flooding the field with your own monsters
He does something very different, being a commander focused on guessing and grouping cards, such as with Fact or Fiction, Boneyard Parley, Brilliant Ultimatum, or Hostile Negotiations