Capítulo 729: The key?

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I'm not very clear about what I know. The first time, it was probably to refine this sunken Jade Tower and give it to the star lord of the sky origin sector. But from what I know, the star lord of the sky origin sector can only use less than one-tenth of the sunken Jade Tower's power. No one has seen the true power of the sunken Jade Tower yet."

"Refined? what did he use to refine it?" Ye chen asked curiously.