Faithful Mending is a uncommon Instant card from Innistrad: Double Feature (DBL), collector number 221. Current market price: $5.47 (foil $28.67), TCGplayer market prices via Scryfall.
You gain 2 life, draw two cards, then discard two cards. Flashback {1}{W}{U} (You may cast this card from your graveyard for its flashback cost. Then exile it.)