Denethor, Stone Seer is a rare Legendary Creature — Human Noble card from Tales of Middle-earth Commander (LTC), collector number 422. Current market price: $0.43 (foil $0.44), TCGplayer market prices via Scryfall.
When Denethor enters, scry 2. {3}{R}, {T}, Sacrifice Denethor: Target player becomes the monarch. Denethor deals 3 damage to any target.