The memory crystal took the form of a purple crystal.
It was saved in Zhou Heng's mind, just like the things he had previously drawn.
It could be called out with just a thought.
After Zhou Heng closed the door, he began to read the information in it.
Multiple scenes flew past him. It contained various information such as voice and text.
As this was only part of the Seal Wraith's memory, the information presented was intermittent and incoherent.
After Zhou Heng read most of the information contained in the memory crystal, he connected the messy and intermittent information and summarized what he could with clarity.
Fortunately, this part of the memory did contain some information about the ghosts.
The ghosts in this world were not born from humans' souls after they died like Zhou Heng had previously thought. At first, they were the Yin spirits born out of a natural Yin aura that was turbid.