Vampire's Bite is a common Instant card from Duel Decks: Sorin vs. Tibalt (DDK), collector number 19. Current market price: $0.28, TCGplayer market prices via Scryfall.
Kicker {2}{B} (You may pay an additional {2}{B} as you cast this spell.) Target creature gets +3/+0 until end of turn. If this spell was kicked, that creature gains lifelink until end of turn. (Damage dealt by the creature also causes its controller to gain that much life.)