The second type is quite rare, mostly naturally formed Heaven and Earth Treasures, with very few like the Earth Soul Crystal which are artificially crafted.
"Swish!"
Zhang Yao reached out and summoned another new demon fish.
The outer shell of the Earth Soul Crystal is the only material Zhang Yao has seen so far that can confine and suppress Primordial Energy.
This means he can exploit this feature, using the Earth Soul Crystal as an 'adapter', treating the demon race's body as a shell, forcibly infusing his Primordial Energy into it, pressing and urging its bloodline to advance.
He didn't need to think twice to know that this approach had many drawbacks, and the success rate would probably be very touching.
Even if it succeeded in the end, since his Primordial Energy was used, the advanced demon race would most likely be a crippled monstrosity, the only advantage being that the collected bloodline might have an exceptional affinity with him.
