Chainer's Edict is a uncommon Sorcery card from World Championship Decks 2002 (WC02), collector number cr57. Current market price: $0.61, TCGplayer market prices via Scryfall.
Target player sacrifices a creature of their choice. Flashback {5}{B}{B} (You may cast this card from your graveyard for its flashback cost. Then exile it.)