I Can Hunt Nightmares

Fifty years after the Great Cataclysm, humanity, at an astonishing speed, re-established a unified order and civilization on the ruins, and everything seemed to be thriving.However, in the corners that most people couldn't see, darkness and evil were slowly festering.At the same time, 'Nightmares' from another world were gradually encroaching on reality.A legendary mage who was once a transmigrator, in an accidental exploration incident, accidentally transmigrated back to his original world, starting from scratch on the path of pursuing power.'Nightmares? That thing is the nutrient for me to become stronger!'