So King really is more durable than Kaido. Initially it was strange that Izou and Kawamatsu couldn't pierce him while they managed to pierce Kaido. Zoro's analysis really clears it up.
adCOA attacks are unable to do real damage to King because of some special ability linked to his race. Zoro needs to figure it out fast
More details proving that King is superior to the typical Yc1. Zoro recognized the music as well so he must know it is Hiyori...did Hiyori play for him before?
Looks like a fire chapter.