Borg

Borg (防壁魔法 （ボルグ）, Borugu, Magic Barrier) is said to be the proof of a Magician. It is a defensive ability. It uses Magoi to cover the user's surroundings to block out attacks with evil intentions. It also blocks out most physical attacks and magical attacks to some degree. Its strength, however, depends on the person. According to Professor Myers, if the Borg is attacked by immense physical strength, then it can be crushed/destroyed.

In the case of the Magi it seems that they are unable to dent their Borg because of its hardness unless a Metal Vessel or a Household Vessel is used. It seems that it can be distorted to change its strength in a particular region.

It is also possible to create a massive Borg barrier.

Trivia

 * Ugo is the only person capable of crushing a Borg with physical strength to date. However, the Fanalis Corps of the Reim Empire have also been shown destroying Borgs with their bare hands and feet, albeit only the Borgs of the weaker mages.
 * Aladdin is the only Magician shown so far capable of distorting his Borg.
 * The Magic "Ugo" is also able capable of destroying Borg physical strength.
 * Magicians are the only ones capable of creating and using a Borg.
 * The name of this ability is a corruption of the Arabic word بُرج Burj, which simply means "Tower" or "Citadel".