บท 1617: Crucial Tribulation

Soul cores with the size of a chicken egg, dark blue to the point of being black, rained down on Dang Hun Mountain.

The soul core contained all of the essence of a soul beast, after the soul beast died, its corpse would turn into smoke and scatter, leaving behind only its soul core.

Soul cores condensed a large amount of soul path dao marks, they were a top tier Gu material.

Soul cores could be found in all sizes, an ordinary soul beast's soul core was the size of a rice grain, and would only be the size of a chicken egg when they reached rank six. Those of rank seven were slightly larger, while a rank eight immemorial soul beast's soul core was as large as a horse carriage.

After a round of discussion, Fang clan finally agreed to Fang Yuan's request, secretly sending him a large amount of soul cores. These soul cores were almost all rank six Gu level, with few being rank seven soul cores, and as for rank eight soul core, there was not even one.