{R} Case of the Ransacked Lab (Promo Pack) [Murders at Karlov Manor Promos][PP MKM 045]

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.