Seize the Storm is a uncommon Sorcery card from Innistrad: Double Feature (DBL), collector number 158. Current market price: $0.29 (foil $0.91), TCGplayer market prices via Scryfall.
Create a red Elemental creature token with trample and "This token's power and toughness are each equal to the number of instant and sorcery cards in your graveyard plus the number of cards with flashback you own in exile." Flashback {6}{R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)