Smiting Helix is a uncommon Sorcery card from Modern Horizons (MH1), collector number 109. Current market price: $0.22 (foil $0.26), TCGplayer market prices via Scryfall.
Smiting Helix deals 3 damage to any target and you gain 3 life. Flashback {R}{W} (You may cast this card from your graveyard for its flashback cost. Then exile it.)