Roar of the Wurm is a uncommon Sorcery card from Duel Decks: Mind vs. Might (DDS), collector number 49. Current market price: $0.34, TCGplayer market prices via Scryfall.
Create a 6/6 green Wurm creature token. Flashback {3}{G} (You may cast this card from your graveyard for its flashback cost. Then exile it.)