Military action
After the events of the Quest - "Gabe's Training Regiment" , demon power already looked to be on the rise across Ysgard. This came to a head when the town of Frumpton, however newly established as it was, was sieged by demons and destroyed in a little more than a single night. Adventurers were dispatched to the area immediately and destroyed a large number of them with a valiant struggle, and they were mostly successful in their efforts - the only demon to have gotten away being the mysterious Bone Devil that was assumed to be the ringleader of the invading demons. It is unknown where this Bone Devil escaped to.