I am the Demon king, but why do the Goddesses favor me? - Chapter 33: Defend or Eliminate

The protagonist travels through Shu Mountain and becomes a demonic dragon guarding the heavenly book in Dinghu Peak.

Waking in a strange yet familiar room the main character now will rise to the top of one most dangerous worlds of fiction with his new cheat.

I transmigrated as the hidden mastermind who betrays everyone at the story’s end.Since I wasn’t particularly interested in the destruction of the world, I was just leisurely waiting for the ending…“You are the only one who has ever seen my drawing of a boa constrictor properly.”“When I make plans to meet you at 4, my heart starts racing from 3… Is this what it means to be tamed?”For some reason, the heroines keep showing interest in me.

A supreme expert in the Immortal World had died, and a strand of his soul returned to its original body on Earth. Tang Xiu discovered with amazement that ten thousand years passed in the Immortal World, yet only a single year passed on Earth.

Ruthlessly betrayed by his lover and trusted friends, Tang Xiu found that his soul went back to his previous body on Earth, and, despite he spent 10,000 years in the Immortal World, just a year has passed on Earth and many things have changed. Having an unsurpassed knowledge, Tang Xiu will protect his loved ones and go back to the Immortal World to take his revenge.

- Description from Novelupdates