Gu Hang was just one step away from reaching a higher level, the Four Gods level.
But this step is a world apart.
Being called the first below the Four Gods is both a fact and an exaggeration.
The factual part is that as long as those four great Evil Gods and the Emperor don't personally intervene, there are few who can oppose Gu Hang. He wouldn't say he's invincible, but no one would dare claim they can definitely win against Gu Hang.
Bas Sol is also at this level, but he was still severely struck by Gu Hang's Storm God Kingdom, causing him to flee in disgrace and anger.
The exaggeration lies in the claim of being the 'first below the Four Gods,' as if he wasn't far off, but in reality, if any one of those four great Evil Gods fully engaged him, Gu Hang wouldn't last a day before perishing.
He has some resistance against the Four Gods.
But it's only limited to that.
