Class-Changing Mage: Awakening SSS-Level Synthetic Talents

[Game Invasion + Master + Upgrade Stream + Multiple Women] Monsters invaded the game decades ago. At the age of eighteen, you can awaken your profession and talents and join the human defense army to resist the monsters. Chen Yu changed his profession to mage and awakened SSS-level synthetic talent. You can synthesize equipment, skills, and items! While his classmates were still competing for rankings in campus competitions at school, he had already become a legend on the frontline battlefield, clearing the gods and demons in reverse...