Rift (Hub)

A Rift is an anomaly known only in the Hub. Like the rains, and thunderstorms of Earth it's unpredictable, and almost random in its locations. Inhabitants of the Hub commonly keep their distance as it can displace soldiers from the Hub to other worlds.

Limitations
Rift's were discovered to be unable to properly from around a lot electricity, and metal. Something that the Wolf's Dens have a lot of. The mostly appear in unoccupied areas, and can't be disrupted.