The Connected Dimensions

Since the creation of time there has always been thousands of dimensions but we are only going to talk about two. We like to call them the connected. A couple hundred years ago, The Royal Elf Mage, Aelfric, wanted to break the barrier between the dimensions and he did with the cost of his life. When he set the goal to break the barriers, he didn't know that it would release Shadow Knights, protectors of the dimensions from the Underworld but he did know the stories of them, he just choose to not believe them. The first of the connected is the Earth Dimension its full of humans who are called Norms, they are a strange species. Then there is the second of the connected is the Mageía Kósmos Dimension its full of what the Norms would call the "supernatural". Then there is the Shadow Knights, they were made by the creator to awaken when the laws of the dimensions were broken. The Shadow Knights cause death and despair to the connected but for some reason the norms can't see these knights but some other species in the Earth Dimension can see them like dogs and cats. The humans have no idea about the war that's going on, so it's the duty of the people in Mageía Kósmos to protect dimensions and they have for hundreds of years.