Battle Aura

Battle Aura (闘気) is a technique used to amplify physical capabilities of the individual to the extreme.

Overview
Battle Aura, in essence, is a form of Mana manipulation, but different from the flashy effects of Magic invocation as it is invisible to the naked eye. It is specifically used as a technique to explosively boost physical power and physical defense. It involves coating the whole body or a specific body part in Mana and forming a mantle of dense energy.

It does not have a specific training regime, an individual will naturally come to understand how to wear Touki the more they train their body. In the case with Rudeus, he is unable to understand how Touki functions, similar to how he doesn't understand healing magic; as a result, he is unable to use it. This is attributed to the Laplace factor as Laplace was also unable to use Touki, but some, such as Sylphy, are able to.

All swordsmen and fighters at or above Saint-class are able to wear Battle Aura. Some use it subconciously as to why they cannot explain their impermanent outbursts of strength during battle.

Offense
Battle Aura is typically used by all swordsmen. Wearing Battle Aura is woven into the art of swordsmanship, it worked to improve one's physical prowess and strengthening the blade of the sword itself. Swordsmen whose Battle Aura has been fully developed are able to cleave boulders in a single stroke, or unleash a flash of the blade to strike a distant foe.

Other than swordsmen, Warriors, Knights, and martial arts practitioners also wear Battle Aura to enhance their weapons' durability and physical attack.

Defense
Instinctively, swordsmen and fighters sheathe themselves in a protective veil of Battle Aura around the user's body or a specific body part. When mastered, the veil of Battle Aura can become impenetrable to most physical attacks. It also greatly elevates one's sense of the battlefield.

Dragon Battle Aura
Dragon Battle Aura (龍闘気) is taught by the First Dragon God during the time when the Dragon Tribe were struggling in the Dragon World against the larger dragon predators which allows its user to multiply their physical abilities many-folds and harden their skin, that is strong enough to pierce the toughest dragon's hide in 1 blow. Although the power itself is possessed by other races, the Dragon Battle Aura is far superior to the others which allows the Dragon Tribe to be the most powerful in the Dragon World.

Saint Dragon Battle Aura
Saint Dragon Battle Aura (龍聖闘気) is the greatest combat technique of the Dragon Tribe created by the Dragon God Urupen. It is a style that uses relatively less Mana, and boasts an overwhelming defensive power that only attacks of very high caliber are able to leave an effect on the user.

Trivia

 * Demon God Laplace was one who was unable to wear Battle Aura.
 * Most of those born with the Laplace Factor are inherently unable to wear Battle Aura, and it tends to be weak even for those who can.

Known Users

 * Orsted
 * Paul Greyrat
 * Badigadi
 * Ghislaine Dedoldia
 * Eris Boreas Greyrat
 * Gal Farion
 * Nina Farion
 * Jino Britts
 * Reida Reia
 * Isolte Cruel
 * Kalman II
 * Kalman III
 * Auber Corvette
 * Doga
 * First Dragon God
 * Dragon Tribe