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"For my Lord and Master, I will do anything! Even if I have to tear apart my soul to release the True Demon dwelling within me!"
Marchosias roared, as his humanoid shaped body took a sudden change. He was covered on white and blue fur, his head transformed into that of a huge wolf, he gained giant paws, his posture became quadruped, and he gained a long, wolf-like tail.
Indeed, Marchosias within the Book of Demons, Goetia, was known as a "Fire-Spitting Demon Wolf" that had wings and could spit fire everywhere, it was a wild beast with no intelligence.
Yet the Marchosias everyone was confronting was intelligent, and knew how to fight with his bare hands, and didn't even look like a wolf!
It didn't made sense, isn't it?
However, this was because Demons that grow strong enough possess what's called "Dual Natures", within their Souls rests the true embodiment of their Demonic Powers.