Conciliator's Duelist is a rare Creature — Kor Warlock card from Secrets of Strixhaven Promos (PSOS), collector number 182p. Current market price: $0.49 (foil $0.90), TCGplayer market prices via Scryfall.
When this creature enters, draw a card. Each player loses 1 life. Repartee — Whenever you cast an instant or sorcery spell that targets a creature, exile up to one target creature. Return that card to the battlefield under its owner's control at the beginning of the next end step.