The further they advanced, Zhang Fei and the three women could feel the increasingly cold chill. "How can this area be this cold?"
"Have you ever heard of Qi veins in our universe?" Feng Bingying asked back.
Zhang Fei nodded at her. "I've encountered one in the past, but it was only a low-grade Qi vein. All realms or domains have them, but their quality and grade vary, with the highest being peak grade."
