It's unclear whether ghost cultivators intrinsically provoke heavenly thunder due to their nature, or if it's simply bad luck to encounter a thunderstorm.
In any case, Xu Song's path to core formation became increasingly perilous once the violent thunderstorm erupted.
The thunderstorm drove away the majority of the gathered demon beasts, yet Zhouyang sensed that the demon python he had wounded hadn't retreated far and was still lurking nearby, waiting for an opportunity to strike back.
To avoid attracting more intense heavenly thunder, he and Xiao Ying had to land on the lake surface, releasing their void traveling tower ship to shelter from the rain.
Though primarily designed for flight, the void traveling tower ship hadn't lost its ability to travel on water.
