Back in the Luo clan, Yi Yun had attempted to temper his body. He had even consumed a Heaven Devouring Wyrm tailbone, but the Luo clan's body-tempering techniques were ultimately limited. Using their techniques to temper his body would require large amounts of time and effort. He decided it wasn't worth it.
However, Yi Yun now had the 'Dragon Emperor Technique.' It was completely different.
Gradually, his sweat began to mix with strands of blood. Drops of bloody sweat began evaporating on his skin, forming a blurry blood mist.
The blood mist seemed similar to, but was completely different in nature than, the blood mist that appeared over Snake Girl, Feng Yunyang, and the others back when they were being baked in the Concealed Dragon Cauldron.
The blood mist that boiled out from Yi Yun was ordinary blood. There were even impurities contained within. After being burned by the scorching dragon blood, it effused an unpleasant smell.