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Abyss Demons, though intelligent species,
are by nature barbaric with extremely contradictory attributes.
The living conditions for the lower and middle grade demons are harsh; for civilization, it's like finding any place to live will do.
Thus, finding a city similar to human civilization in the Abyss is nothing but a joke.
Only the ruins of destroyed worlds remain, which is where a large number of lower and middle grade demons swarm.
Their personal material needs are very low, but for the release of desires, they are among the strongest of all creatures.
The type that upon encountering you, if they find you delicious, will really kill and eat you on the spot.
To enslave such demons, one must satisfy their killing desire, other treatments can largely be ignored.
Of course, the most important thing is absolute strength.
And speaking of the higher and top demons in the hierarchy.
Take the Legendary Demon Lords for example.
