It seems that the Lord of Darkness sensed that Black Servant Sen was close enough to Murphy, so he personally triggered a "remote detonation," trying to let Murphy experience the despair of having his Light-eating Divine Power continuously drawn out for a frenzied self-explosion.
Indeed, this Harmonious God, the Lord of Darkness, seems to have learned something from the players' use of Light-eating Divine Power, bringing this self-explosion quickly and fiercely without any forewarning. If Black Servant Sen really exploded at this distance, it's likely all three vampires would be injured.
However, just as the Ratman was about to self-destruct, Murphy pressed his left hand onto its head.
