The Realm of Daoyan

Mortal romance, slow-burning, no harem, and the protagonist is a serious person. The towering mountains are endless, and the rushing rivers are like dragons passing through. Someone whizzed by with a sword, and the sword energy lingered for a long time. A demon roared loudly, and its aura covered the sky and blocked the sun. When an ordinary young man steps into the world of spiritual practice, he accidentally gets a piece of mysterious green copper and begins to conquer the world of spiritual practice. Big demon? Divine body? Just nourishment