Love Song of Night and Day is a uncommon Enchantment — Saga card from Dominaria United (DMU), collector number 25. Current market price: $0.29 (foil $0.38), TCGplayer market prices via Scryfall.
Read ahead (Choose a chapter and start with that many lore counters. Add one after your draw step. Skipped chapters don't trigger. Sacrifice after III.) I — You and target opponent each draw two cards. II — Create a 1/1 white Bird creature token with flying. III — Put a +1/+1 counter on each of up to two target creatures.