Compression Technique

The Compression Technique (圧縮の術, Asshuku no Jutsu) is a classified as a specialized practice of  manipulation.

Description
The Compression Technique works through the minimization of one's exerted magic power to the point where it compresses and touches the outer layer of the skin as a form of pseudo-armor. Such a phenomenon can only occur when one diverts part of their attention to consistently compressing the exertion of their magical aura to the point where it is often mistaken as a method of stealth.

There are currently two widely used methods of employing the Compression Technique. The first is the compression of spells casted by the user in order to make use of greater potential energy as opposed to explosive power. Through compressing the area-of-effect of a spell and focusing it into a single target, a skilled practitioner can release the compression for but a moment in order to exploit the explosive impact that comes from the smaller medium. Of course, doing so becomes very tricky against skilled enemies, whom can disrupt one's concentration and dispel the compression, potentially injuring the user.

The second use of compression is used as a training mechanism. When one has exerted all of the magic power they are capable of emitting at a single point in time, they can then compress this very magic as a form of armor and, to a degree, create multiple "layers" of this armor. By reducing the overall quantity of magic power that one has accessible to them, a user is forced to train in making use of exceedingly small quantities of magic and maximizing the efficiency of said quantity.

Notably, if one employs the Compression Technique with an item that affixes spells in place, it is possible to mitigate the drawback of the spell's control requirements, albeit it can still be dispelled by factors outside of the user's willpower.