In the direction of the Sel Mountains.
The demons, who had been secretly cooperating with the Red Robe Mages and were relatively obedient, launched a rebellion. Abyssal portals opened one by one in Sel, and the Demon Legion from the Bottomless Abyss descended. Their leader, a powerful six-armed serpent demon, tore through many of Sel's defenses and even annihilated the secretly created Demon Beastmen army of the Red Robe Mages.
The situation persisted until a group of formidable female knights riding black unicorns appeared; only then were the rebellious demons suppressed and driven back into the Sel Mountains.
The Red Robe Mages spent a long time polluting the unicorns' bloodline, meanwhile creating a group of black, evil unicorns, organized into a legion by an all-female Sel Knights group. Their existence instilled fear in countless people; they are notorious as a legendary legion in this realm.
