Legit wondering how does Zoro even find the race of King? Particularly when it is very mysterious race. Unless, King explains his race, I don't see any other way for Zoro to find about the race in the middle of the fight
The more we see of Kaidou and Bigmom, the more I feel that Hakai is overrated (it is overrated when people say as strongest attack in the series). Kaidou AP sucks and Bigmom AP sucks but somehow there combined attack is the 'strongest'. Funny that the way Oda portrays or people pretends is that Ikkoku sovereignty, Bigmom signature attack is less than contribution of Bigmom (even when she didn't use haki).