About

In this world there are every type of being, demon, human, elf, beastkin. But, there are two types of demons, mana demon and a hell demon, the mana demon are type of normal demons who can do magic and stuff they aren't violent as much as the hell demons are, mana demon eat normal demons food (not humans or any other being),they live only a thousand years. The hell demons are different very different, they live forever and they devour humans and every other being, they are far stronger than any other being and a hell demon keeps getting powerful by devouring living things (humans, demons, elf, beastkin) they live in ancient forests and are ancient themselves. Their skin can't be cut through but can only be pierced through with a sword made of a special material called "Zen" but even after cutting by a katana made of light they can heal back, the only way to kill them is to cut their neck with a katana made of Zen or make them come out in the sun the sunlight (they can't come out in the sun or they will die). They have god like beauty. Every other beings fears them and doesn't want them. Almost every hell demon now days has lived centuries Hell demons used to be human after becoming hell demon with their own will, only hell demons know how a human becomes a hell demon. Hell demons have ranks to decide which one is the strongest, the rank automatically gets up or down as the grow stronger or weak. Only hell demon can tell another hell demon's rank. No matter if the demon is any number they will still get a rank. The top ten rank are rare to be seen and feared of the most, every demon slayer was ts to avoid them. They say that the top ten rank demon have never been replaced and are the most oldest one alive.