The Weakest System in History

There is a system with its own host, The halo was shattered and he was not allowed to cultivate to immortality. He destroyed the main god and didn't let him cultivate to immortality. They robbed the mall and didn't let him practice immortality. After eating the great god, he was not allowed to cultivate to immortality. In the end, the host discovered that he was already an immortal. (Newbie, new book, please support me, please give me advice.)