Reincarnation System: Possessed Girl Becomes the Strongest in the World

[Job change + single female protagonist + system] In the year 2000 of human calendar, a sudden large-scale disaster caused by the [gate] caused various countries in the world to be invaded. Sudden changes caused most countries to perish from this unexplained disaster. At the same time, people also got the opportunity to awaken their talents and become "professionals." The coming of the catastrophe caused people to abandon most of the land and gather strength. In the end, six main cities were left, guarded by six heroes respectively. Until the 300th year of the New Calendar, people still faced off against the monsters in the [Gate]. Mo Yang, a system codenamed "Invincible", came to this world. I thought I could possess the most talented host, kill the monsters, and regain the sovereignty of the world, but who knew that I would possess the timid Lin Meng instead. "Why is she the key to saving this world?!" Mo Yang: With SSS-level talent, you are invincible! Come on! Lin Meng: No! I'm just an assistant ah ah ah QAQ....