Somewhere in the endless space,
'Damn it...these mindless demon apostles are more powerful than us, the demon kings.'
Tagrek was flying in the endless space on his magic leaf whale cursing the demon apostle just a few hours ago.
'Before the emperor sends more of his demon apostles, I need to get away from this territory and take shelter in the Great void emperor's territory.'
In his current situation, even a low-level king could kill him. So, he just wanted to get away from the primordial demon emperor's world.
As for why he chose the Great void demon emperor's territory to take shelter was because everyone knew the primordial demon emperor and the great void emperor was not on good terms from the beginning.
If not for the fact that the human emperors were becoming too powerful, the other demon emperors were stopping them from fighting until they killed a couple of human emperors.