One Person: a Thousand-Year Old Immortal, Beating up the Heavenly Master at the Beginning

[Being sealed by a friend for a thousand years at the beginning? No big deal! When Gu Xuanji woke up, he found that the world had changed: the disciples of his friend Zhang Daoling had become top bosses, but he only had a trace of his soul left, and he was unlucky enough to live in a tattered robe! There is also a thing in his mind that calls itself the system, which keeps issuing tasks every day, which is so annoying that his brain is about to explode! Gu Xuanji said: This start is really... So interesting! Thousand-year-old weirdos are fishing online, and the system is so angry that it crashes! Alien world? The water in this pool is muddy enough to be fun! Let's see how the most "disrespectful" robed spirit in history ignores the system while making new waves in the alien world! Physical body? Looking for it! Fun? Looking for more!