Chainer's Edict is a uncommon Sorcery card from World Championship Decks 2003 (WC03), collector number pk57. Current market price: $1.79, 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.)