Zetsukinjutsu

Zetsukinjutsu (ゼツ禁術, Lit. Absolutely Forbidden Technique) is a technique that is absolutely forbidden under any circumstances. Unlike a normal kinjutsu, which is forbidden normally for going against the laws of nature, zetsukinjutsu tend to go against the very laws of space, time, and reality itself. These techniques could cause long lasting if not permanent damage to surrounding areas if used, and could cause absolute destruction if these techniques should fail to be used properly. Zetsukinjutsu are used by very few due not only to their dangerous risks outweighing the benefits, but due to the fact very few have had the ability to create a zetsukinjutsu. Those who have been able to are normally absolute masters in certain fields of jutsu, but have been shown to rarely if ever use them in combat.