"It seems that the higher the grade of the pill, ritual artifact, or treasure, the longer the refining process takes! Moreover, there's a chance of failure, and it might not even work on certain treasures!"

"But thinking about it, that's only natural. If every treasure could be refined instantly, this Heaven and Earth Furnace would be too heaven-defying!"

As he silently pondered these new discoveries, Su Shi'er looked down at the various crystal-clear top-grade spirit pills before him, feeling elated.

With his current spirit root aptitude, combined with these top-grade spirit pills, his cultivation speed could definitely double.