Above all spirits

For her, he transcended dimensions and crossed world boundaries, all to find her. For him, she turned white-haired overnight and gave up a thousand years of life, all to save him. This is a 'world' where gods, demons, Asuras, dragons, and various other races coexist. This 'world' is divided into three dimensions: the Alpha Dimension, the Omega Dimension, and the Gamma Dimension, also known as the Mortal Realm, the Other Shore, and the Immortal Realm. Each dimension has its own rules. (See the book for details; the setting is too long.) The Mortal Realm is further divided into eight realms: the upper four are the Dragon Realm, the Titan Realm, the Fairy Realm, and the Demon Realm; the lower four are the Human Realm, the Blood Realm, the Spirit Realm, and the Demon Realm. He, who transmigrated here, initially thought it was just a parallel world and was preparing to embark on a journey of plagiarism and revenge...