If these substances aren't removed, not only will they affect the absorption of the Demon Core, but they will also increase the likelihood of demonic possession.
The impurities aren't simply on the surface of the Demon Core, but are rather interwoven within it, distributed unevenly.
Removing the impurities without damaging the Demon Core is no easy task, not to mention for mortals, even Immortals would find it challenging to achieve.
Unless there's absolutely no other way, refining a Demon Core, especially one of this quality, is even more troublesome than cultivating oneself.
All of this was told to him by the system, which didn't just inform him of the difficulties in Demon Core refinement but also provided him with the chances of success, which are lower than those of digesting the Demon Core to obtain mana.
"Host, please rest assured, with your cheat, refining a Demon Core is a piece of cake," the system said.
