Bubbling Cauldron is a uncommon Artifact card from Magic 2014 (M14), collector number 205. Current market price: $0.11 (foil $0.47), TCGplayer market prices via Scryfall.
{1}, {T}, Sacrifice a creature: You gain 4 life. {1}, {T}, Sacrifice a creature named Festering Newt: Each opponent loses 4 life. You gain life equal to the life lost this way.