"It's... red."
Beast core ranking from weakest to strongest:
Black, Blue, Purple, Red, Gold.
Corresponding names were:
Ordinary, Saint, Demon, Legendary, and Celestial.
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Back when Xun Wei revealed the fact that she possessed a purple beast core, Xiao Hei gave them a brief explanation about what the different colours meant.
Putting it into his hands, Xiao Fang could feel the tremendous amount of Qi being stored in the core. He nearly drooled at the thought of cultivating such a cultivation treasure.
Since the Abnormal Beast was dead, the other tiered beasts were in disarray. Some continued to attack, while the others began to flee. Seeing this, Xiao Fang stored the glowing red beast core in his spatial ring, then with the Abnormal Cannibal Beast's help, he hunted the remaining tiered beasts down.