It's unclear when it started, but Thunder Marsh grew stronger, thus increasing its allure to the Thunder Demon God, making him subconsciously want to refine it.
"Since you have an idea, please proceed. Having decided to join the Prehistoric World, I will not go back on my word. No matter what unforeseen circumstances we may encounter next, I will do my utmost to assist you."
Though what Jiang Chen said made sense, the Thunder Demon God still felt a bit uncertain, but it didn't matter anymore.
As he said, having made up his mind, he could only see it through to the end, existing with the Prehistoric World thereafter.
Furthermore, from the Thunder Demon God's perspective, joining the Prehistoric World at this moment was nothing but beneficial to him.
If the Prehistoric World could indeed devour this place, then even if it can't ascend to the Eternal World, it would lay an eternal foundation. Future ascension to the Eternal World would be just a matter of time.
