Cabal Therapist is a rare Creature — Horror card from Modern Horizons (MH1), collector number 80. Current market price: $0.34 (foil $0.83), TCGplayer market prices via Scryfall.
Menace At the beginning of your first main phase, you may sacrifice a creature. When you do, choose a nonland card name, then target player reveals their hand and discards all cards with that name.