The heavenly wind which flew at a super high speed in Ice and Fire Heavenly Wind Layer was a great test to the protective battle qi of any immortal general. Zhang Tie's protective battle qi was almost hit by heavenly wind per second. Therefore, he had to sustain great stress.
The heavenly wind was composed of the wind element, water element and fire element. Heavenly ice wind was under heavenly fire wind. They both flew towards different directions. Like two big rivers, they were neighboring each other; however, they didn't disturb each other. Such fantastic scenery in the world!
At this moment, Zhang Tie was traveling in the heavenly ice wind at more than 1,500 m per second like a dauntless man crossing turbulence. It was a great speed for common wind immortal generals.
