Your search for "Plumb the Forbidden 81" revealed the following:
Plumb the Forbidden (STX) from Strixhaven: School of Mages, available at 401 Games Canada. Rarity: Uncommon Finish: Normal Artist: Andrey Kuzinskiy Card Text:As an additional cost to cast this spell, you may sacrifice one or more creatures. When you do,...
Plumb the Forbidden (Foil) (STX) from Strixhaven: School of Mages, available at 401 Games Canada. Rarity: Uncommon Finish: Foil Artist: Andrey Kuzinskiy Card Text:As an additional cost to cast this spell, you may sacrifice one or more creatures. When you...
Plumb the Forbidden - The Hobbit: Desolation (Foil) (SLD) from Secret Lair Drop, available at 401 Games Canada. Rarity: Rare Finish: Foil Artist: James Bousema Card Text:As an additional cost to cast this spell, you may sacrifice one or more...