Anti-Skill

Anti-Skill (能力殺封) is a special constitution that has the ability to nullify almost anything.

Description
Anti-Skill is a Spiritual Body constitution that has the ability to suppress or "seal" all spiritual/magical forces that the user comes into contact with and it can use the negated force to counteract physical energy (Although it cannot negate things that have both physical and magical properties at the same time) and can be turned off and on at will. It can also shut down a majority of skills (including ultimate skills) and completely seal their use for a period of time. However, it can only be transmitted through the users direct touch and not through any mediums such as weapons.

Guy Crimson was able to bypass anti-skill entirely after some exposure.

Although Anti-Skill can counteract physical force under most circumstances it does not make the user completely immortal, purely physical attacks unenhanced by magic can still deal the user damage and Diseases and Poisons can still take effect. Things needed to live such as food and oxygen are naturally still needed.

Anti-Skill is not permanent. After some time without contact from it, the skills and magics that were shut down can be used once again.