The weakness of Demons is their heart, something that is no secret to any experienced adventurer. However, some people are puzzled by why once the heart is destroyed, the Demons die so quickly, without even the strength to struggle a bit. It's known that Demons exhibit extraordinary vitality; even if their limbs are all severed, they will crawl to bite you with their mouths. Yet, as long as their chest has a hole pierced through it, their life fire extinguishes immediately, like being doused with a bucket of cold water.
If Kalalin and his Black Cult colleagues heard this, they would certainly sneer at the question, because the questioner is focusing on the wrong thing. Instead of wondering why the heart is the weakness of Demons, it's better to ask why these Abyssal residents possess such supernatural vitality—it's because of their extraordinary heart, of course.
