If it only had the devouring ability, Xin Yun might not have felt so terrified. After all... Xin Yun's acidic fog is no slouch either, capable of corroding the diamond barrier. However, the most terrifying aspect of the dark clouds is that they can actually devour spiritual power and the Power of the Soul, even to the extent of devouring souls!
It could be said that even without the enemy attacking, in at most ten minutes, Xin Yun would lose without a fight. Given the strong devouring and corroding characteristics of the dark clouds, once the diamond barrier was broken, it would take only a few seconds to completely devour the Giant Dragon, leaving not even a speck of residue behind.
