Akaza's blood demon art, destructive death, merges shockwaves with martial arts, making him a deadly combatant.
Webmuzan's bda spoilers ahead manga discussion.
As we know a part of muzan's bda is the ability to fully control the flesh in his body but after ubuyashiki nukes him and he is.
Webwith his crescent moon blades blood demon art and his moon breathing style, kokushibo is almost as strong as muzan, the king of demons.