Miasma. Energy from the depths of the Demonic Realm, fostered through the countless carnage of demons and Devils alike.
A power vested within the darkest of creatures, dwelling in irksome gifts that bode destruction.
It was once called the power of doom. As it bore strength far superior to that controlled by humans.
Aura, Mana, Dark Mana, Divine Mana, and Killing intent paled before the full brunt of the Demonic energy, Miasma.
Humans capable of using this energy were termed Demonic Humans. Humans are capable of surviving a contract with the forces of the Demonic Realm.
Devils and Demons, alive, subjected themselves through inhumane sacrifices to get their consciousness to the mortal realm. Whispering sweet nothing into the ears of subconscious humans, pulling them to a world of no return.
It granted them strength, one that far surpassed the humans, yet it continuously pulled them further away from humanity.