A compact discard spell from Magic: The Gathering's Mystery Booster set, Mind Rot forces an opponent to discard two cards and sees play in casual and some cube decks. Printed with an Unknown rarity designation in this set, it occupies a low-cost niche for collectors and players seeking efficient black removal effects. Current market value sits at $0.03, reflecting common availability and limited demand. Grading or sales history may modestly affect individual copies' worth.