"Demon-Slaying Magic is completely different from the traditional schools of magic taught by the very beings they are meant to slay! It is an entirely different kind of supremely powerful magic, far removed from Dragon Slayer Magic or even God Slayer Magic—" Gazing at the terrifying aura radiating from the 'Achill' before him, Achill carefully searched his memories of the ancient texts on Lost Magic he had read, then said calmly, "There is no method for teaching, learning, or inheriting it. According to the ancient records, there is only one way to master this extraordinarily powerful magic: you must become a demon yourself! Then, as a demon, you must experience, understand, and comprehend it on your own! Eventually, you will naturally achieve a sudden understanding of this magic... That is precisely why Demon-Slaying Magic almost never has duplicate attributes!! Almost everyone who comprehends it possesses a unique ability all their own!! Thus, the magical properties and demonic nature of every form of Demon-Slaying Magic are completely different—"
"When I first read about such bizarre magic, I thought the ancients were joking. I never imagined that something so strange actually existed..." Tightening his grip on Shinsō once more, Achill pointed it at the fully transformed 'Achill' opposite him and slowly continued, his expression grave, "Tell me. What is your demonic nature? Or rather, what is the special property of your Demon-Slaying Magic? I assume it is more than this so-called devouring. After all, that is a trait every Demon Slayer Mage possesses, and the only way to identify them. What I want to know is, as a Demon Slayer Mage—"
"What is your unique trait..." Appearing to 'Achill's' right, Achill swept Shinsō toward his head and demanded in a low voice, "That! Is! All!!!"
To Achill's surprise, however, his opponent could