Jared Carthalion, True Heir is a rare Legendary Creature — Human Warrior card from Commander Legends (CMR), collector number 281. Current market price: $0.29 (foil $0.36), TCGplayer market prices via Scryfall.
When Jared Carthalion enters, target opponent becomes the monarch. You can't become the monarch this turn. If damage would be dealt to Jared Carthalion while you're the monarch, prevent that damage and put that many +1/+1 counters on it.