Still Enrolled with Cheats? Let Me Lead the Frontlines to Slay Demons

(Ratings just released, you can ignore them) [High Martial World + Alien Invasion + Growth-Type + Lao Liu + Lighthearted Abstraction + Ensemble Cast] (Not invincible; if you don't like it, don't enter!) (Leave the academy within a hundred chapters) I am Fang Bai, Fang Bai from Earth! Not sure what wind blew, I woke up to find myself transmigrated into this High Martial World. This world is even more surreal than I imagined. A wall divides Dragon Country into two worlds! Outside the wall, demons roam, and humans wield powers beyond civilized understanding; with these powers, they keep the demon hordes at bay outside the wall! Inside the wall, thousands of lights glow; ordinary people live peacefully, sheltered like greenhouse blossoms. After a certain year, Fang Bai awakens a demon-slaying rebate system; as long as he slays demons, he grows stronger! From inside to outside the wall, wherever Fang Bai goes, not a single demon remains! After two and a half years, Fang Bai returns for the national exam, and the world discovers that he has already become a Martial God!