This electrical horror has sprung forth from Dr. Aeon's Power Transference System! Could this be a side-effect of tapping into Mount Diable?
Defeating Deathsurge awards the Surging Badge.
You have helped defeat Deathsurge.
A Deathsurge is spawned for every 100 Cap au Diable Demons that are killed in the zone.  Prior to Issue 12, up to three Deathsurges could have been present at any one time, until the Issue specifically limited the number to one.