Demon gods don't have a fixed form. The shackles of the rules of the void universe that binds them are in the process of being broken. They are similar to Origin gods with supreme laws. Each cloud is different. Some might look similar with the same color but they are completely different.
WRATH and CARNAGE are both in the form of a red cloud. But one cloud is a floating sea of red fire and the other is a floating sea of blood. They are both red and they both influence everything that gazes at them with violence but they are different fundamentally. They are also very powerful.
What's worse is that they all came with a significant portion of their strength. Each cloud is as large as a continental landmass. That is enough energy within them to drown a hundred demon kings. As if that isn't enough, there are all 10 of the demon gods of the abyss here. It is a practical recipe for a disaster so he doesn't see how this can have a happy ending. He is just being realistic.