Greater Auramancy is a mythic Enchantment card from Wilds of Eldraine: Enchanting Tales (WOT), collector number 4. Current market price: $20.33 (foil $41.47), TCGplayer market prices via Scryfall.
Other enchantments you control have shroud. (A permanent with shroud can't be the target of spells or abilities.) Enchanted creatures you control have shroud.