Chainer's Edict is a uncommon Sorcery card from Dominaria Remastered (DMR), collector number 425. Current market price: $0.23 (foil $0.39), 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.)