Case of the Shifting Visage is a rare Enchantment — Case card from Murders at Karlov Manor Commander (MKC), collector number 19. Current market price: $0.36, TCGplayer market prices via Scryfall.
At the beginning of your upkeep, surveil 1. To solve — There are fifteen or more cards in your graveyard. (If unsolved, solve at the beginning of your end step.) Solved — Whenever you cast a nonlegendary creature spell, copy that spell. (The copy becomes a token.)