The First Senior Sister motioned for Fang Chen to sit down, then asked with a soft smile.
"I originally thought the Heart of the Matrix might be a certain type of spiritual material, but its use is so peculiar, and it hasn't gained sentience like a spirit treasure, so I couldn't be sure."
Fang Chen mused.
"Calling it a spiritual material is actually correct."
The First Senior Sister nodded lightly. "It's just that if no one told you, you probably wouldn't be able to guess where it comes from or what level of spiritual material it is."
Chapter 581