Below, Phoenix Spirit had gradually experienced five waves of Divine Thunder, not only the Three Caverns Divine Thunder but also one type of Three Xiao Divine Thunder, and two types of Five Extremes Divine Thunder.
At this moment, the sixth wave of thunder tribulation appeared, and within the depths of the thunderclouds, overwhelming firelight emerged.
This was one of the nine kinds of Heart-Burning Thunder, specifically the Heart-Burning Fire Thunder.
This kind of thunderfire could harm the Dao Heart Primordial Spirit, primarily targeting the Dao Heart Primordial Spirit.
The appearance of the Heart-Burning Thunder also indicated that this rebirth tribulation of Phoenix Spirit was possibly the Seven-Nine Thunder Tribulation.
According to Zhang Jian's understanding of the changes in thunder tribulations, usually the appearance of a Heart-Burning Tribulation, or Terminal Thunder Tribulation, or special celestial tribulation means the thunder tribulation is nearing its end.
