Thunderblade Charge is a rare Sorcery card from Future Sight (FUT), collector number 124. Current market price: $0.43 (foil $0.68), TCGplayer market prices via Scryfall.
Thunderblade Charge deals 3 damage to any target. Whenever one or more creatures you control deal combat damage to a player, if this card is in your graveyard, you may pay {2}{R}{R}{R}. If you do, you may cast it without paying its mana cost.