In this world, there were two kinds of Demons: those who stayed behind the Obelisk's Barrier, and those who were expelled from it. Naturally, there was something apparent, aside from their size, that made the two different—the power they possessed.
As the living conditions of the Demons that stayed behind the Barrier were harsh, they were naturally stronger compared to those who lived outside.
Because of this, there was also a significant difference between Demons of the same class and kind. The Middle Class Demons Hobgoblins that lived outside the Barrier would never be able to defeat those from behind the Barrier.
Such a case also applied to Spells: Demons that lived behind the Barrier received less damage from the same Spell one used to kill Demons that lived outside of the Barrier.
