Chain Lightning is a rare Sorcery card from Secret Lair Drop (SLD), collector number 370. Current market price: $19.97 (foil $18.59), TCGplayer market prices via Scryfall.
Chain Lightning deals 3 damage to any target. Then that player or that permanent's controller may pay {R}{R}. If the player does, they may copy this spell and may choose a new target for that copy.