Lightning Surge is a rare Sorcery card from Judgment (JUD), collector number 96. Current market price: $0.49 (foil $4.96), TCGplayer market prices via Scryfall.
Lightning Surge deals 4 damage to any target. Threshold — If there are seven or more cards in your graveyard, instead Lightning Surge deals 6 damage to that permanent or player and the damage can't be prevented. Flashback {5}{R}{R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)