History of Benalia is a mythic Enchantment — Saga card from Dominaria Promos (PDOM), collector number 21p. Current market price: $3.90 (foil $6.55), TCGplayer market prices via Scryfall.
(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.) I, II — Create a 2/2 white Knight creature token with vigilance. III — Knights you control get +2/+1 until end of turn.