Butcher's Glee is a common Instant card from Dragons of Tarkir (DTK), collector number 90. Current market price: $0.11 (foil $0.42), TCGplayer market prices via Scryfall.
Target creature gets +3/+0 and gains lifelink until end of turn. Regenerate it. (Damage dealt by a creature with lifelink also causes its controller to gain that much life.)