Twenty Years of Sign-In at the Heavenly Prison, Then I Became Unrivaled

Chu Xuan transmigrates into a fantasy world and becomes the deposed crown prince of the Great Xia Dynasty.

From the start, he's thrown into the imperial prison, but luckily awakens the Sign-in System.

As long as he signs in at special locations, he can receive generous rewards.

"Ding! Sign-in successful. Obtained the Ice Saint Body!"

"Ding! Sign-in successful. Obtained the Nine Dragons Pulling a Coffin!"

"Ding! Sign-in successful. Obtained the Dragon-Elephant Suppressing Prison Art!"

Years later, when Chu Xuan walks out of the imperial prison, he discovers that he has become invincible beneath the heavens!

This novel and its characters are entirely fictional. Any resemblance to real people or events is purely coincidental. Do not imitate.