How is that dumb luck? He screamed for the purpose of injuring Cobra. It was awesome.
Well, I'm very glad the fight ended like that, first good chapter in a while. I'm also glad he wasn't a real dragon slayer, because there's TOO MANY OF THEM. Just fire and steel plz. However, Cobra made it seem far too easy for a fake dragon slayer to come about, so unfortunately, we'll be seeing way too many of those in the future. Fucking Mashima. Doing what I want him to do but in the most obnoxious way possible AGAIN.
No, he screamed because he was about to lose and was being a baby about ti and just lucked out that his roar blew his ears out. if it were intentional, I can dig it but it was clear it was nothing but an accident. And that makes it AWFUL.