Versatile Mage: Companion Beast, Soul-Eating Demonic Gu!

(Multiple heroines, growth stream, genius stream) Ye Yu traveled through the world of full-time mages and waited for fifteen years until he awakened to magic, but he still could not usher in his system. But the little Gu insect that appeared at the same time as Stardust made him embark on a completely different path! From that moment on, demons are his qualifications! Genius is his fuel! The devil is his dessert! Disaster is his feast! The demon country is hostile and the holy city is judging! He dances with the dead souls of geniuses, makes a contract with the demons of hell, and is an enemy of the order of the world!