Fairy, you have strayed into the devil's cave

Qin Shou was reincarnated as a demon. Because he was too afraid of death, he sealed himself in a secret magic cave and practiced secretly for 30,000 years.
Thirty thousand years have passed. As a peerless demon in the tribulation period who has gone through tribulation nine thousand nine hundred and ninety-nine times and is invincible in the world, Qin Shou is still worried about how to go through the tribulation without making any noise during the ten thousandth time.
Just then, a fairy accidentally broke into his cave.
Reach out your tentacles and grab!
Qin Shou captured the fairy easily. Over the past 30,000 years, the fairies who occasionally strayed here would voluntarily become his good friends and play with him for a while.
"Then I'll get started."
However, this fairy this time seems a little different?
At the same time, the strongest cultivators in the world of immortal cultivation learned from the prophecy of the heaven that there was a great evil demon hidden in the world, so they formed a crusade team. However, the fairy in the team seemed a little familiar?
…………
When the world-destroying demon surfaces, the way of heaven will change and the secret of ascension will also emerge in the world!