"The true demon, our Demon Skill, is an authentic power of the demonic path. Those who practice the Demon Skill, as long as they are willing to accept the Demon Seal, can gain additional power from the Heavenly Demon.
"There are 18 levels of the Demon Seal. The deeper it is, the stronger the control of the Heavenly Demon becomes. Once it reaches the 18th level, you become a slave to the Heavenly Demon, obeying its every command.
Youyue revealed the secret of the Demon Palace.
"Where is the Heavenly Demon?"
Li Su asked.
Youyue shook her head: "I don't know. Our initial contact with the Heavenly Demon and the acquisition of its power came through the Demon Stele. There are countless Demon Steles, so even if many people in the Demon Palace are killed by the Tribulation Thunder, the supply of people never stops."
She continued to explain.
As Youyue spoke, Li Su came to understand the situation within the Demon Palace.
The Demon Palace was not established by any demon cultivator.