System+Cthulhu+different world
This world is full of strange auras. One step may lead you to an imp, ten steps to a demon, and a hundred steps to an ancient god. If you are not careful, you will fall into the endless abyss.
But this has nothing to do with Ryan, because Ryan has a talent: the Book of Mysteries, which can collect tricks.
The evil spirit who killed countless people became his little brother, and the famous three-headed dog became a watchdog.
"Hey, you can't eat that octopus!!!"
