But those normal CoC clashes you're talking about did 0 Damage, it was just to show off that someone has CoC. Zoro used CoC clearly to damage Kaido, and in fact he did scar him with it. Just like Oden did. And don't tell me that Oden has no ACoC. It was confirmed by Oda that he has it. It was also confirmed by Kaido aswell. There is no way that a standard application of CoC can scar a hybrid Kaido. Oda said that someone with ACoC only can damage Kaido. The only logical conclusion is that Zoro used ACoC buddy.