Strength Magic (力魔法, Chikara Mahō) is a type of Magic where the magician orders the Rukh that produce Magoi to change into Strength Magic. It is the seventh-type of magic; Magicians who have an affinity to the seventh type are known as "Black Magicians". Seventh-type magicians have a remarkable aptitude toward the third type.
Strength Magic allows Mages to utilize pure physical force as a form of offense and defense. Mages who possess the ability to utilize such Magic are able to generate these elements from their wands or vessels, and manipulate them. Black Magicians are able to use spatial influence to twist things, compress them, make them float or fire compressed projectiles of pure force which is strong enough to pierce Borg and a Magician easily.  Users of this Magic are also able to augment their physical strength to use empowered attacks. Strength Magic is apparently hard to deal with as the techniques are invisible to the human eye and put into application the divine providence of this world. However, high amounts of pure force can be visible and materialized in the color of black.