Kapu Kuialua

Is an ancient martial art based on bone breaking, joint locks, throws, pressure point manipulation, strikes, usage of various weapons, and battlefield strategy. Its actual name of fighting art was referred to as "Kuʻialua", literally meaning two hits. This fighting style was so lethal that in two hits it could completely maim an opponent joints and bones, by literally breaking them. it is unknown where Raido Σ learned this style but claims to have learned it at a young age. His master to make sure he learned it correctly put Raido through brutal training sessions before their final bout. To which they would fight to the death. Raido winded up killing his master, and the other students who practiced under them to prove his dominance over them and the fighting style. When Combined with his sharingan he is able to utilize this fighting style with alarming accuracy, and deadly results. The injuries obtained from fighting him in close combat often result in horrifying injuries that cause terminal damage to a shinobis life. Due to the horrific results left behind of his fighting style medical ninjas have labeled his fighting style a Forbidden art, one not to be taught nor passed down due to its savage style of attacks. However Raido has no intention of teaching this style keep it only for himself.

History
This fighting style is used as a defensive standpoint allowing the other to attack first, as it teaches to fight only if left with option due to its unholy effects. However when employed it is meant to completely shatter or destroy key components in the joints of the body, such as cartilage tears and severe damage to the pressure points. Even attack the nervous system of the human body to leave it unresponsive and open to attack. This fight style is used to methodically and clinically wear opponents down by destroying them one body part at a time. Raido Σ was taught this savage style by his master who held a class of 12 students. he inflicted brutal training on them to ensure they would master it, and then had them fight each other and use the style on their own peers. As fate would have it, Raido managed to single handily slaughter his entire class with his bare hands, and face his master. Using the Sharingan it allowed Raido to pick his master apart joint by join and then finally destroy his master completely. Medical Nin who has witnessed those who survived called this a medical nightmare as some bones and jointed were smashed beyond repair leading to long term possibly chronic damage. The style was immediately labeled forbidden and was thought to have been forgotten, but Raido is now the sole practioner of this style.