Sun's Bounty is a common Instant card from Coldsnap (CSP), collector number 18. Current market price: $0.12 (foil $3.52), TCGplayer market prices via Scryfall.
You gain 4 life. Recover {1}{W} (When a creature is put into your graveyard from the battlefield, you may pay {1}{W}. If you do, return this card from your graveyard to your hand. Otherwise, exile this card.)