In the end, both problems were resolved.
Although the Abyss Demon Lord did not discover a method to completely control the Night Spirits, he did develop a way to guide them.
As long as a special "mark" was placed on a target, the Night Spirits would go berserk to attack it, just like sharks smelling blood or beasts spotting raw meat.
The first problem was thus roughly solved.
The solution to the second problem was to be executed by the Abyssal followers supported by this Abyss Demon Lord.
This Abyss Demon Lord taught a summoning ritual he developed to this group of Abyssal followers, who were responsible for guiding the Night Spirits towards the source, summoning them to the source bit by bit.
Upon hearing this, Reiger and Beluti understood.
"This group of Abyssal followers, it's the Dark Relief Center, right?"
There was no other possibility.
