Currently there were 6 dark red glowing crystals in Su Yubing's hand which attracted Mo Yuxin's attention.
"What's this?" Mo Yuxin asked.
Su Yubing first held these small dark red crystals in her hand before opening them to see what it looked like. These crystals were quite beautiful and looked like a polished jade but the structure was obviously different and violent yet abundant spiritual energy present in them gives away to their identity.
"It's a spiritual beast core. Every spiritual beasts of rank 3 and above has these crystal like cores within their body.
Some have it in the position of their hearts or some have it in the center of their head. It varies from different beasts but the function is the same for every beasts.
