Nazgûls Stories

In the year 402 an ancient Dark Force led by Y/n was bash even his army from another world but over years in 1180 ( Don't ask why I am combine all the games in the different timelines) Y/n uses all of his magic to transfer himself and his army even tribes or monsters in reality. With good creature felt the Dark presence, they later appear or transfer to their world to stop the Dark Forces rampage but they must find the ring so Y/n can be defeat and killed. How would all the kingdoms unite against the creatures of darkness.