Case of the Ransacked Lab is a rare Enchantment — Case card from Murders at Karlov Manor Promos (PMKM), collector number 45p. Current market price: $1.13 (foil $1.51), TCGplayer market prices via Scryfall.
Instant and sorcery spells you cast cost {1} less to cast. To solve — You've cast four or more instant and sorcery spells this turn. (If unsolved, solve at the beginning of your end step.) Solved — Whenever you cast an instant or sorcery spell, draw a card.