After travelling for four days, Mo Wuji came to a halt as he was attracted by the coldness of his surroundings. When he approached the source of the coldness, he realised that it was actually an extreme ice cascade.
Logically speaking, when water reached a temperature which was low enough, it would turn into ice. The ice cascade in front of him was actually not ice but still liquid. Even so, the extreme coolness exuded from it was something even Mo Wuji's physique could barely take it.
Mo Wuji was certain that under such extreme conditions, an average Heavenly God wouldn't be able to last long without any magic treasure protection.
A cascade which wouldn't turn into ice was definitely something formed from a pure ice attribute treasure. Because of the laws, no matter how cold it was, it wouldn't freeze.
Mo Wuji used his spiritual will to scan through and his body flashed into the extreme ice cascade.