Controvert is a uncommon Instant card from Coldsnap (CSP), collector number 30. Current market price: $0.23 (foil $0.85), TCGplayer market prices via Scryfall.
Counter target spell. Recover {2}{U}{U} (When a creature is put into your graveyard from the battlefield, you may pay {2}{U}{U}. If you do, return this card from your graveyard to your hand. Otherwise, exile this card.)