C358 Can it be upgraded again?

Could he still improve?

The process of refining the 10,000 Year Earth Essence Spirit Liquid was extremely long and painful, as if a century had passed.

"Huff!" "Huff!"

Chu Yun gasped for breath. Every time he took a deep breath, the Spirit Qi in the entire War Cultivator's Hall would turn into a whirlpool and surge into his mouth and nose.

If there was an outsider present