Songbirds' Blessing is a rare Enchantment — Aura card from Secrets of Strixhaven Commander (SOC), collector number 174. Current market price: $0.42, TCGplayer market prices via Scryfall.
Enchant creature Whenever enchanted creature attacks, reveal cards from the top of your library until you reveal an Aura card. You may put that card onto the battlefield. If you don't, put it into your hand. Put the rest on the bottom of your library in a random order.