Chronicles of the Reincarnated Demon God

The Junior Heavenly Demon, Yeon Woon-hwi, was born without a dantian.
However, through dark arts and his shitty personality— er, preternatural ability, he became the junior lord of the Heavenly Demon Cult.
He was a man of many epithets:
‘Great Sorcerer of the Dark Arts’
‘King of the Wandering Lost Souls’
But the people’s assessment of him was simple:
“If he smiles, run as fast as you can. His smile is a death sentence.”
“Catch his eye, for he shall provide you with lifelong protection. That is, if you can.”
He was living the good life, when suddenly, he was betrayed in a coup led by the vice-lord and elders of his cult.
“You seem to have forgotten what kind of person I am, Uncle. So die. All of you.”
Using the holy relic of the first Heavenly Demon, he self-destructed, taking the traitors with him. And then, he opened his eyes to the most unexpected of places…
“I’m in the Tang Clan? And a branch family at that?”
He awoke as Tang Woon-hwi, an illegitimate son of the Nine Dragon Branch Family, a subset of the Sichuan Tang Clan.
Will Woon-hwi be able to find his master, bring together his scattered followers, and rebuild the Heavenly Demon Cult?