C2039 Butterfly and

"Brother-in-law, what is this?" This was the first time Wu Bao Er had seen a beast core.

"When some powerful monsters die, their strength will instantly condense, forming energy crystals. They resemble the relics left behind by a monk's sparks. We call these crystals beast cores!" Dongfang Qingyu said.

"Doesn't that mean they are very precious?" Wu Bao Er became excited