Ballad of the Black Flag (Assassin's Creed 13) - Uncommon Magic: The Gathering Card

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after IV.)
I, II, III — Mill three cards. You may put a historic card from among them into your hand. (Artifacts, legendaries, and Sagas are historic.)
IV — Historic spells you cast this turn cost less to cast.