Moan of the Unhallowed is a common Sorcery card from Ultimate Masters (UMA), collector number 107. Current market price: $0.09 (foil $0.35), TCGplayer market prices via Scryfall.
Create two 2/2 black Zombie creature tokens. Flashback {5}{B}{B} (You may cast this card from your graveyard for its flashback cost. Then exile it.)