I'm in a Forbidden Area Watching a Prison, the Prisoners are All Villains

[Invincible + Villain + Demon Suppressor]

After traveling through seventeen years, Xu Qing became the only demon-suppressing envoy in the forbidden area.

The villains sent in have stronger backing than the last!

The Saintess of the Heavenly Demon Palace: "My Heavenly Demon Palace will never let you go!"

Taoist Tun Yang: "Let me out now! Otherwise I will destroy your Zi Yang Sect!!"

Jin Huan Xie Lao: "Young man, as long as you let me out, I will make you the strongest person in Ziyang Sect within three years."

…

The new villains began to seduce Xu Qing.

Only a few villains who had been imprisoned in the forbidden area sighed helplessly.

"Why do these newcomers always think that the Demon Suppressors are weaker than them?"