Emperor of the Nine-Soul Sword

An Immortal Realm Sword Emperor is schemed against and unexpectedly reborn. He grows stronger and stronger, with revenge as his goal. Then the Demon Realm invades the Immortal Realm, and some powerful figures become its slaves. He returns to the Immortal Realm, destroys his enemies, and takes command of the realm to fight back against the Demon Realm. He destroys the mastermind behind the Demon Realm, becomes invincible across both realms, and establishes a new order and set of rules. The early story focuses on cultivating until he can return to the Divine Realm and exact his revenge. The woman he loves has a high status, so he works hard to become stronger for her.