User blog comment:Fliu/Chapter 987: Now It's War!/@comment-29391896-20200811094807/@comment-30281369-20200811185500

Hard to say regarding Enma as we haven't seen Zoro let loose with it. Also I might be mistaken, but I don't think they ever said that Enma was the only sword that can hurt Kaido; only that it was the only sword to have hurt Kaido (until now that is).