Wait, System. I'm not done yet. William said in his mind as he drew more of the surrounding Mana into close proximity of him. It had started evaluating his Cultivation Technique on its own, but there was more to be done.
After absorbing so many World Cores over the last few months, William had gained a general understanding of Chaotic Qi. The System explained a little bit about how Chaotic Qi worked, but there was much more to it than that.
First, he understood that the only Mana suitable to become Chaotic Qi was what had been stored within the World Cores. The stronger the World Core, the more Primordial Mana, as the System called it, was stored.
Both of these things became obvious after he tried to create Chaotic Qi of his own, despite the System claiming he couldn't harness it yet.