I'm a Righteous Sect Spy, but I've Become the Demon Sect's Last Hope?!

Lin Yu transmigrates as a ruthless villain in the Ten Thousand Demons Sect, but is actually an undercover agent for the righteous path.

This identity is a high-risk role through and through.

Just as he's about to run, he awakens an Undercover System.

As long as he brings down the Ten Thousand Demons Sect, he can grow stronger.

If the Ten Thousand Demons Sect executes him, he'll become a Saint on the spot!

Either way, there's nothing to lose, so Lin Yu goes all out causing trouble!

He says the cultivation manual has flaws, and the Ten Thousand Demons Sect's elders see the light, upgrading the technique overnight!

He tries to provoke the vicious Taotie, but it recognizes him as its master and devotes itself to protecting the Ten Thousand Demons Sect!

He leads the righteous cultivators in a sneak attack, only to help the Ten Thousand Demons Sect avert a thousand-year crisis!

The demon leaders: "Senior Brother Lin is a genius! Heaven bless the Ten Thousand Demons Sect!"

The Demon Venerable: "From now on, Lin Yu's word is my command!"

The righteous cultivators grit their teeth: "This bastard is more destructive than a real demon! We have to eliminate him!"

Lin Yu breaks down: "...Why don't you just kill me?"

Ding! Current achievements:

[Expression] Successfully increased the Ten Thousand Demons Sect's strength by 1000%.

[Expression] Ranked No. 1 on the righteous path's most-wanted list...