Zhang Chen is a clever person. Based on Xiaodouding's few words, he immediately sensed something was amiss. How could Elder Wu have cultivated into a Yang God? It was clearly a mass of incense flames arranged in a unique pattern, enveloping his Divine Soul.
"Incense God Dao!" A thought jumped in Zhang Chen's mind, and soon a plausible deduction gradually formed: "The Yellow Heaven Dao must have discovered the use of the Power of Incense while excavating the Ancient Great Tomb somewhere, realizing that gathering the Power of Incense could easily step into the Mysterious Realm. Hence, they started researching its use. Finally, in a certain year, Yellow Heaven Dao succeeded in their research, considering mundane Martial Dao insignificant, thus removing restrictions to win people's hearts."