Late System: Dark Echoes of the Guardian

My name is Lin Yuan, an ordinary college student. On a rainy night while working in the library of Jiangcheng University, I accidentally awakened a strange system that was twenty years late. It claimed to be the "Guardian Training System", but it was severely damaged and exhausted. It only issued one task for me: survive until dawn. I thought this was just a ridiculous nightmare, until I saw the monsters in the darkness with my own eyes, and saw those strange beings that should only exist in ancient books begin to crawl in the shadows of the city. The system told me that this world should be guarded by nine branches of guardians, but the other eight branches have long been annihilated in the long river of time. The inheritance system of the "Time" lineage encountered an unknown attack while traveling through time and space. Its core shattered and fell into this world, a full twenty years late. Twenty years is enough for many things to seep in quietly. Existences called "abnormal", "weird", and "indescribable" in ancient books are seeping out from the cracks in the plane, lurking in the shadows of the city, eating away at the last peace of this apocalyptic era. And I, a loser whose bloodline concentration is only 0.0001%, Became the only successor bound to this broken system. There are no invincible techniques, no heaven-defying plug-ins, only a broken system with less than 0.1% Energy, and a world that may be swallowed by darkness at any time. But the system says that once some wars start, there is no option to exit. When the belated bell finally rang, darkness was already echoing in the depths. And I must learn how to be the last light before this echo swallows everything.