The Cultivator Prince

A peak Quasi-Emperor Realm Cultivator 'fails' his ascension trial to the Immortal Emperor Realm and is reborn into the body of the framed First Prince of the Kingdom of Stonewall. He suppresses enemies, fights immortals, seeks a soulmate, and ascends to the throne. He realizes it was all just the three thousand demons of his heart, overcomes the Trial of the Heart's Demon, and breaks through to the Immortal Emperor Realm.