User blog comment:Fliu/Chapter 987: Now It's War!/@comment-29391896-20200811094807/@comment-108.83.222.210-20200812022329

Umbrasphere, good point. While Enma is the only weapon that we have seen actually hurt Kaido up until this point, it is not unreasonable to assume that it is the only weapon in the world that could hurt him. It stands to reason that others could under the right circumstances.