Spider Spawning is a uncommon Sorcery card from The List (PLST), collector number CMA-149. Current market price: $0.36, TCGplayer market prices via Scryfall.
Create a 1/2 green Spider creature token with reach for each creature card in your graveyard. Flashback {6}{B} (You may cast this card from your graveyard for its flashback cost. Then exile it.)