Emissary of Grudges is a rare Creature — Efreet card from Commander 2018 (C18), collector number 20. Current market price: $0.37, TCGplayer market prices via Scryfall.
Flying, haste As this creature enters, secretly choose an opponent. Reveal the player you chose: Choose new targets for target spell or ability if it's controlled by the chosen player and if it targets you or a permanent you control. Activate only once.