I fucking called it. Kaido used Conqueror's Haki with Thunder Bagua. Been saying for years that there is more to CoC than just fodder control, and that you can imbue it directly into your attacks. It was so obvious with all the clashes we've seen involving CoC that, that's what they were doing. Looks like Oda has given us the answer as to how Luffy is going to defeat Kaido, and it will be CoC related.