After this research it was clear that this is all connected but there was one problem with it that if this book teleported us to this world and echoes could be human that finded the first crystal than what about the things that the book says that ancient civilization and things but it could be possible that these books and crystals are spread to the world from anyone during the conversation suddenly the people started turning into a abnormal being and attack the hero and that man this was clearly something wrong that we don't know