Tiandao defense system

Taofu accidentally traveled to the Xuanhuang Realm and obtained the Heavenly Guard System. From then on, he searched for the reason why no one in this world has ascended in ten thousand years.

Prison start + pseudo-invincibility + growth invincibility + system.

Cultivation level - Qi refining realm, Xiantian realm, Spirit control realm, Mountain and sea realm, Leaving the orifice realm, Yuan condensing realm, Overcoming tribulation realm, Entering the Tao realm, Turnaround realm, Ascension realm.

A cool story with a plot.