Thunder rained down upon Zheng Yichen like a barrage, but the main target of those thunder strikes was the black light which forcefully crushed the descending bolts, growing ever more intense in its assault on the dark clouds. Meanwhile, in the heat of battle, Zheng Yichen tried to reduce the protection of the black light.
Having lost part of his protection, Zheng Yichen successfully sensed the enemy's curse strength increasing.
He was certain that as long as he suffered damage that affected his own life, the enemy would fall under the influence of a Catastrophe Curse similar to that of Great World's God Taisui.
This was not an active ability, but a passive one.