Beacon Bolt is a uncommon Sorcery card from Guilds of Ravnica (GRN), collector number 154. Current market price: $0.22 (foil $0.32), TCGplayer market prices via Scryfall.
Beacon Bolt deals damage to target creature equal to the total number of instant and sorcery cards you own in exile and in your graveyard. Jump-start (You may cast this card from your graveyard by discarding a card in addition to paying its other costs. Then exile this card.)