From the above dialogue, two things can be confirmed.
1. The one who can be the master of a Mature Body-Demon must indeed be a high-ranking demon recorded on the stone slab, or even an existence at the Old King level.
2. As for the black scent... black is a type of color, why would it be described as a scent?
However, Han Dong himself has experienced the so-called "black scent", which is not long ago when he lived together with the consciousness of the stone slab in a dream.
Han Dong could smell this black scent from that black woman.
A scent that smells somewhat dull but alluring.
Han Dong, who has been staying with the consciousness of the stone slab for a long time, even gradually developed a sense of 'photophobia', which is the side effect of inhaling this scent for a long time.
Moreover, to some extent, this scent also gave Han Dong a sense of dependence on darkness.