The Disciple of the Sword, Magic, and Heavenly Venerable

After entering human society and seeing adventurers chant one spell after another, Grimo finally realized how useless he was.

He had no class, no skills, no rank, and even his level was unknown.

Truth be told, he'd vaguely suspected as much for over a decade. The master who taught him how to cultivate immortality every day was probably a pretty unreliable person...