Absorb Vis is a common Sorcery card from Duel Decks: Sorin vs. Tibalt (DDK), collector number 31. Current market price: $0.25, TCGplayer market prices via Scryfall.
Target player loses 4 life and you gain 4 life. Basic landcycling {1}{B} ({1}{B}, Discard this card: Search your library for a basic land card, reveal it, put it into your hand, then shuffle.)