Wake up and Be Haunted by a Big Devil?

[Narcissus+Traditional Immortal Cultivation+Double Power+Non-brainless and cool text+No system+No blood+sense of fate] When he woke up, Xiao Huaijin entered the novel he had written. He had no identity, no memory, and no golden finger. All he had was a madman clinging to his body, pressing against his lifeline, murmuring his name almost obsessively. He finally remembered that Xiao Yuheng was a villain in his works who was extremely beautiful, powerful and tragic. The strange thing was that his memory seemed unable to piece together a complete story. Did he have a split personality? He is not Xiao Huaijin, who is he? Is he Xiao Yuheng...