Despite being mentally prepared, Lin Yi broke into a thin sweat as soon as he stepped into the fire realm.
The deep part of the fire realm was hotter than he expected. There's a stark contrast with the comfortable spiritual energy environment of the wood realm.
Contemplating, he did not activate his spiritual power to offset the heat, but instead chose to bear it with his body.
Although the environment of the fire realm was harsh, it might also serve to temper both body and will.
This was not limited to the body's sensation alone. The air he breathed in had a hot, spicy feeling too, and the spiritual energy inhaled here caused a burning sensation in his meridians when refined internally.
However, during his cultivation of the Five Thunder Spells, his meridians had been constantly refined by the absorbed thunder and lightning, making them incredibly resilient. As such, this degree of heat was practically negligible to him.