When Momonga had finished refining his spirit form, the chaos that had occurred in the demon world and the human world at that time disappeared in an instant, leaving the demons in both worlds astonished.
While waiting for his bones in the human world to dissolve completely, Momonga's spirit emerged from its hiding place and headed straight for the border gate of the two worlds.
Momonga's spirit just laughed at the pile of ashes of the lower caste demons who died because their powers had been absorbed and transferred to Momonga's perfectly formed spirit.
Now all that's left in the demon world is the demons with middle and high castes and of course the hybrid who is being demanded to find out what happened to the demon nation.