Caizher ignored how much damage he receives, the only thing in his mind at that time was to kill and kill. It is the only thing that he can and needs to do! It is the only thing that matters!
The chances of Caizher dying might seem like a hundred percent but he will not let himself die without fighting! Even if he can only throw a couple of punches towards the heavens and Bruce, it is already enough for him
Caizher uses the two to fuel his anger for the past years. It grew to the point that he doesn't even know what to do about it anymore. He won't be satisfied to die without giving them punches for what they have done to him!
Kill! Kill! Kill! Kill!
Caizher already doesn't know how many people he killed. He didn't bother counting as for him, all these Emperors that bent on the heavens' will are the same. They are all dead in his eyes
No matter how many attacks Caizher had received, he didn't let them stop him from killing the people that should die