Duncan felt his insides experiencing a burning sensation the more he traveled through the terrain.
He hadn't noticed it earlier, but the heat that was being generated by the magma rocks and the overflowing lava in the region was causing some noxious fumes to be emitted into the air. Inhaling these fumes might not have affected his health immediately, but constant exposure to it was making his breathing hard.
Moreover, the very air that he inhaled also contained some fire qi mixed in it. The region was dominated by heat and fire so much that it would have been a paradise for a fire cultivator.
Unfortunately, Duncan wasn't one.
Thus, the fire qi he had breathed inside his body was making him feel mightily uncomfortable. It was clashing with the slaughter qi in his body. While the slaughter qi in his body remained dominant, these clashes within his body were making him very uncomfortable.
