Court of Garenbrig is a rare Enchantment card from Wilds of Eldraine Commander (WOC), collector number 25. Current market price: $13.94 (foil $16.79), TCGplayer market prices via Scryfall.
When this enchantment enters, you become the monarch. At the beginning of your upkeep, distribute two +1/+1 counters among up to two target creatures. Then if you're the monarch, double the number of +1/+1 counters on each creature you control.