"Phew–Phew–"
In the underground world beneath the sand, Yi Yun felt hot wind blowing at him. It made him feel like his body was burning.
Even though Yi Yun cultivated in pure Yang laws, he still found it difficult to withstand the heat. It showed just how overbearing the pure Yang Yuan Qi was.
Yi Yun continued his descent but, after hundreds of thousands of feet, he still failed to see the bottom of the cave.
Eventually, at a depth of about a million feet, Yi Yun discovered a vast underground lake.
He was truly amazed to find a lake lying beneath the desert.
But when he looked closer at the contents of the lake, he was surprised. The fluid was dark red in color and there were waves of hot air emanating from it.
Yi Yun focused, and realized that the fluid in the lake was not water but appeared to be molten metal.
Even the fluid that flowed into the lake from tributaries was flowing molten liquid.