The outer part of the Earthfire Vein, with lava rivers capable of melting gold and iron, was as harmless to Xu Mu as a hot bath is to an ordinary person. It couldn't inflict any harm.
Since it couldn't cause any harm, it also couldn't stimulate the Ten Thousand Tribulations True Body.
Taking a moment to adapt to the environment, Xu Mu continued to dive deeper into the Earthfire Vein.
Earthfire Veins and Spirit Stone veins are both types of Spirit Veins. However, compared to the Spirit Stone veins which can be directly absorbed and utilized, the application of Earthfire Veins is considerably limited. They are only useful to cultivators of fire spiritual power or Artifact Refiners.
However, as the Earthfire Vein carries fire toxicity and is usually hidden deep underground, it is challenging to use. Hence, even fewer people use it.
