According to Dong Li, her black tortoise had showed her to that demonic stone in the Dark Forest.

The demonic stone contained the profound mysteries of dark power. Like what humans referred to as Heavenly Talismans, it seemed to have formed naturally.

As for why it came to form in the Sixth Demon Realm, Dong Li had no idea either.

Given her current understanding of dark power, she couldn’t derive the profound knowledge of dark power from the stone by herself.

It was the black tortoise that had solved the stone’s mysteries.

The reason why she had broken through into the Soul realm was because she had come to a brand new understanding of dark power from her soul communication with the black tortoise.

Furthermore, the ultimate darkness and rich dark power released by the stone had fused into her body and helped her break her cultivation barrier, eventually allowing her to enter the Soul realm.

Spiritual materials that contained dark power were very hard to find.

Only black dragons, black phoenixes,...