585th floor: hisatsu waza no heia
the moment you enter the room, everything around you will be hectic, since people has been spamming their ultimate skill to show off to one another.. except it's to repetitive to the point no one care. BUT STILL, it is required to spam at least 100 times of your masterpiece move to ascend the floor
ps: life insurance is not provided, therefore, please tread with cautious. ie, i wouldn't walk straight to rasengan if i were you. with common sense, you'll persevere. good luck