章 2253: Internal Worry, External Threat

"Rank nine advance refinement Gu…" Fang Yuan inspected carefully and found that the appearance was not much different from its previous rank eight version.

However, it had already undergone a qualitative change!

This was Fang Yuan's second rank nine Immortal Gu, it would provide a huge help to Fang Yuan.

Four Elements Square Regret Blood Refinement Pool would also rise to become a rank nine Immortal Gu House because of this.

A rank nine Immortal Gu House!

Such Immortal Gu Houses were few even in the whole history of humanity.

Heavenly Court's Heaven Overseeing Tower was the most famous Gu House. Unfortunately, with the destruction of rank nine fate Gu, it could not be constructed again.