Even when Xiang Anshi was leaving, he was still somewhat distracted, completely enchanted by the future painted by Hou Niao's exaggerations, emotion and spirit in disarray. If it were all true, an alliance would indeed be unnecessary, because the entire Jinxiu Continent would naturally become one entity, united against the cosmic visitors.
But what if it's false? Just an illusion? This guy succeeded in turning down his invitation with a mere speculation, and he couldn't even feel dissatisfied about it.
Truly cunning to the extreme.
A bit sensational, but upon careful consideration, it does make sense; after all, it's the Outer Heaven Universe, how could they care about these ants fighting underground?
Leaving with a mind full of thoughts, for some reason, he has no further interest in the alliance; such a bizarre conjecture cannot be easily shared, hence it can only fester in his mind, waiting for the final puzzle to be solved.
