So for a while, there were red flies everywhere in the building, and more and more people died. I used freezing to kill some flies, but my abilities in the present chaotic situation seem so minimal. Watching the people around me die one after another, my heart is also very sad. I can only do my best to eliminate those red flies, try to help the people around them to reduce some casualties, so that they are more likely to survive. These of us soon arrived at the last floor of the roof. Up there was no covered roof. The building had already reached its end. There must be a...