Starfield Mystic is a rare Creature — Human Cleric card from Wilds of Eldraine Commander (WOC), collector number 76. Current market price: $0.49, TCGplayer market prices via Scryfall.
Enchantment spells you cast cost {1} less to cast. Whenever an enchantment you control is put into a graveyard from the battlefield, put a +1/+1 counter on this creature.