one piece tcg deck boxes Card Game: Official Storage Box Premium Edition - Monkey.D.Luffy - Bandai One Piece One-piece TCG Deckbox

Locket of Yesterdays helps discount the relatively expensive Slime Against Humanity to after a measly two casts, and its colorless identity and extremely reasonable casting cost of makes it a must-have in any deck that plans to cast a ton of copies

You just use it to get a tiny bit of advantage for a few turns, and then it explodes into a mass of Treasures which you can even sacrifice to draw cards

Put down the Lion's Eye Diamond

Even at one mana and with all these modes, this still feels like it won't do enough far too often

That said, I think the upside on Emet-Selch is powerful enough to warrant inclusion regardless