C280 Distortion
Chu Yun had only seen this Purple Sky Heavenly Lightning twice in his life.
The first time was in the Cangnan Domain. When Fu Qingyun killed the Flood Dragon, she used the Purple Heavenly Thunder as her ultimate move.
The second time was when she faced her tribulation, the ninth Heavenly Thunder.
Although the names of the two were exactly the same and their shapes were similar