Sever is a moon in the Outer Spur shattered by the huge amounts of volatile Rift Energy at its core. The Outcast made Sever their home due to the high amounts of Rift Energy in the area. Sever is also where Emmett and Logan were first exposed to Rift Energy after an accident with their Rig.
Emmett later returned to Sever after the destruction of White Sands to avenge the town and bring Logan to justice. After destroying the Outcast ship The Omen, Emmett fought his way to the crashed rift drive on foot, where he confronted Logan. Before he could surrender, Logan was pulled into The Source, and transformed into the Rift Entity. Emmett battled the Entity until he was able to seal it within the Rig.