The nightmare task involves slaying demons.
It is important to know.
The domain corresponding to the Sea of Myriad Islands is quite unique; it consists of a four-layered realm, divided into four Demon Realms.
The First and Second Demon Realms are below, while the Third and Fourth Demon Realms are above.
Stacked together.
Like a cake.
The Fourth Demon Realm is still in conflict, but the demons there have no escape route because the Imperial strategy succeeded, and the Third Demon Realm has already been taken over by humans.
The demons in the Fourth Demon Realm.
Their escape route is cut off.
Like cheese caught between two slices of bread.
No way to escape.
They have no other options but to further attack the humans' holy center empire or to advance into the Third Demon Realm.
And the Third Demon Realm.
Is heavily guarded, with all entrances and exits strictly controlled, preventing large demon troops from entering.
