Weird: Sneaking in the Dark

This is a world without gods. Weird things from the underworld invade the world of the sun. The familiar ghosts and gods of the underworld quietly disappear. A soul from another world came to this world in balance with the earth by chance. With the help of the system, what kind of sparks will he create in this world full of weirdness? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.