Xei Spheres are sealing devices created by the Boneguard. When used in the right way, and by the right people, they can be used to suck away any deity or power. Of course, only the Boneguard can use them to store more than one God or Supernatural Being at a time. - Once a deity is stored within a Xei Sphere, it can "Talk" with it's holder via a series of coloured Boneguard Runes - the likes of which very few people understand.