Cabal Therapy is a uncommon Sorcery card from World Championship Decks 2003 (WC03), collector number pk62. Current market price: $12.77, TCGplayer market prices via Scryfall.
Choose a nonland card name. Target player reveals their hand and discards all cards with that name. Flashback—Sacrifice a creature. (You may cast this card from your graveyard for its flashback cost. Then exile it.)