C1591 Breakthrough the Creator of the Second Calamity

What kind of aura was this?

All the cultivators in Wang family's Ancestral City turned their eyes to the vortex in the sky, because they could feel a terrifying aura from it.

Thunder Tribulation?

Undead Immortal Elder stared at Ning Qi in shock, "Thunder Tribulation? This is about to break through... He killed more than a dozen First Tribulation Creators and began to break through..