Ballad of the Black Flag

(1) (U) (U) 

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
[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 (2) less to cast.

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