The poisonous purple mist was a kind of purple mist that would appear at random times. The mist contained a very Strong Poison. Even an expert in the longevity stage could not guarantee that he would not be affected by this poison. It was precisely because of this that the ocean was almost a forbidden zone in the myriad realm battlefield. Only a few people who liked to take risks would enter the ocean. Of course, those who could come back alive from the ocean were also one in a hundred.
Although octopus Island was on the sea, it wasn't in the deep sea. It was only near the sea. There were almost no absolute dark clouds, energy storms, or poisonous purple mist there, which was why the Xu people dared to live there.