-Master, I sense a hot spot on your left!
Calcifer’s high pitched voice suddenly rang on Carheil’s ears. The entity remained silent for a while knowing its master's strict preference to silence, especially since they are sharing the same mental space. Surprisingly the chatty entity had adjusted well to its master’s temperament through the years and only spoke when needed.
Just like what Calcifer said, the temperature rapidly rose as he got closer to the hot spot. The place was terribly humid and uncomfortable in the lungs. If not for the rigid endurance training they went through for weeks, their bodies would have long passed out.
Any ordinary person, who unluckily stumbled in this place, would have suffocated even at the edge of the hot spot. For a keen eye, it was a clear indication of their quick improvement.