Resize is a uncommon Instant card from Coldsnap (CSP), collector number 117. Current market price: $0.27 (foil $0.69), TCGplayer market prices via Scryfall.
Target creature gets +3/+3 until end of turn. Recover {1}{G} (When a creature is put into your graveyard from the battlefield, you may pay {1}{G}. If you do, return this card from your graveyard to your hand. Otherwise, exile this card.)