Mo Wuji pushed his Wind Escape Technique to the max. However, because of his layer of defence made from fire, his max could not be compared to when he was back in space.
Fortunately, the two battling dragons did not notice an ant-like creature like Mo Wuji. After two hours of fleeing, the sounds of the two battling dragons disappeared behind him, and Mo Wuji could finally heave a sigh of relief. From Mo Wuji's observations, he guessed that those two huge dragons were the metal-type Sword Dragons which existed in the Immortal Chasm.
In the Immortal Chasm, various sorts of dangers exist. Just the Colourless Leeches alone were able to kill most cultivators, much less the Gui Water Spider and the Yin Fire Centipede.
Along the way, Mo Wuji encountered many Gui Water Spiders. However, what made Mo Wuji relieved was that he didn't meet any Yin Fire Centipede.