一下子全都挤了进去的成语

It's too strong, even if it's the fourth level, only those monsters who have rushed to the fifth level can be so strong. The chubby boy lying in the pit with blood on his mouth was a little dazed. How could I be so unlucky? There were more than 30,000 new arrivals. I randomly asked to fight with one of them, and then I met a monster who had the hope of reaching the fifth floor....