Bolder's ring, more commonly known simply as the ring ( or Xeelee Ring ), is a highly advanced xeelee structure and their greatest achievement. It was a large, ring of cosmic string made of construction material that surrounded the milky way galaxy. It contained a high amount of gravity and because of this all things travelling directly in the middle will get destroyed. While at first it was thought by humanity to be a weapon, it was later revealed to be able to open a portal to other universes just in case the known universe was to be destroyed.