The 15th slot is for a nonplayable token or ad card which has a 5% chance of being a foil-stamped signature art card
While I can give you advice on what to buy, dont let my picks discourage you from buying a set that you connect with
Or run Slimefoot as just a Golgari Artistocrats deck without any Saproling theme, up to you
You can use it in combos that abuse ETB and LTB to win a game, but you can also attack with small creatures, make a lot of Food, and gain a bunch of life
Balefire Dragon may be an expensive cast at seven mana, but its more than worth it as a one-side board wipe on legs for all but the hardiest of opposing creatures
Whenever a creature with power 1 or less is put into your graveyard from the battlefield, you may return that card to the battlefield at the beginning of the next end step if Shirei, Shizos Caretaker is still on the battlefield. Basically, youre going to fill the deck with cards like Viscera Seer, Zulaport Cutthroat, Yaroks Fenlurker, and Big Game Hunter, and just recur them for all of time until you win the game through sheer force of will and the little people fighting back
