The demon had retrieved most of the miasma it let out to wear down the yellow stone after its prison broke. But faint miasma still lingered in the room like fog. Of course, it was only faint in comparison to the thick storm clouds of before. An ordinary human would succumb to it after only a few minutes.
If Makkel hadn't had Ackster's Ichor to help him, he wouldn't have lasted long.
When Ackster's Limit Broken Overhuman Senses covered the entire room, he soon found a part of the miasma that was moving slightly differently from the rest. It was like a well that both let out and absorbed the miasma. It was like there was something there breathing the miasma, inhaling and exhaling.