Void

Void Magic is a lost magical element branch which is very powerful. It is based on the fifth of the Japanese elements namely "Kyu" (Void) but it is renamed as "Kyomu" in the anime.

Void magic, as implied in the series, is an element which does not focus on elemental magic (i.e. Fire, Water, Earth and Air). Despite its terrible impact, it is actually a useful element as it is the only element to match and be able to clash against Earth's weaponry.

Since it is very rare, there have been only four Void users and familiars after Brimir has passed on. These users and familiars are: The remaining Void Familiar not yet summoned in present time is Heart of God, with its real name meaning 'Life' in the Ancient Helkeginian language. Details about this familiar is unknown as of Volume 19, but is capable of being sacrificed after preparation by the Mind of God to activate a magic that can destroy an entire race/species. After Joseph's death, Tabitha's twin sister became the Void Successor of Gallia as the power of Void went to her.
 * King Joseph de Gallia, the current king of Gallia (before being dethroned in Volume15); His familiar is Sheffield, the Myozthirirn, or the Mind of God.
 * Louise Francoise de La Blanc de Valliere, also known as Louise the Zero, a Noble and second-in-line for Tristain's throne (Henrietta's proclaimed sister); Her familiar and most loyal protector (not to mention her most important person) is Saito de Chevalier Hiraga, the Gandalfr, or the Left Hand of God.
 * The Pope of Romalia, Vittorio; In the light novels, it has been confirmed that Julio Caesar is his familiar, the Windalfr, or the Right Hand of God . However, none of this was explored in the anime: Julio was shown without a master, the Windalfr was never mentioned, and the Pope never actually appeared.
 * The last one is confirmed to be Tiffania. Also, she has knowledge of the Void magic, its users and their familiars. She had once accessed Jospeh's music box, which she plays as a song in Princess no Rondo. As she is a half-elf and also Albion royalty (Henrietta's first cousin; Tiffania's father, the Archduke of Albion, is Henrietta's father's younger brother). She does not have a familiar, with her about to summon one before being abducted by the elves in Vol19.

It is possible for the Void Successors to know spells each other already knows, with Joseph at one time casting Explosion to destroy his entire palace with one spell and taking more than 80 mages after him along with the palace and its serving staff. There are differences between spells however, where Louise's Explosion tends to go for power and large-scale, Joseph's Explosion is more accurate but have less power; Louise's Explosion would be to destroy the entire palace with one attack and blow it to dust at her most powerful moment, Joseph blew all the supports and foundations at its weakest points simultanously to collapse his palace.

Void Spells that have been used so far in the novels include:

Louise

 * Explosion


 * Dispel


 * Illusion


 * Teleport (only able to teleport to as far as she can see; but is capable of being casted rapidly unlike Illusion)

Tiffania

 * Mind Wipe (two kinds shown so far - ones that can destroy memory of events, and another that can destroy magical compulsion on the mind)

Vittorio

 * Scrying (only into Saito's world)


 * World's Gate (capable of opening a gate/portal into Saito's world - but takes up a lot of willpower when cast)


 * Vision (make the subject relive a event of the past, even if the subject haven't experienced said event; Joseph was shown what his brother felt when their father died, despite not present with his brother back then.)

Joseph

 * Haste (speeding up his movements faster than even what Gandalfr Runes can boost Saito's speed)


 * Explosion (more accurate than Louise's, but not as powerful)

Founder Brimir
(The first 2 spells listed here come from Volume 14, and is currently the only spells shown so far by the Founder as of Volume 19)


 * Explosion (capable of casting ones the same size as the one Louise used to destroy the Albion invasion fleet repeatedly with plenty of willpower to spare.)


 * Portal (moving groups of people and belongings from one place to another, but cannot cross worlds like World's Gate).

Trivia
 * Sheffield's magical creatures seem to have a same rune that glows like hers. Her power as the Mind of God allow her to use any magical artifact, and gives her insight into magic theory.
 * A Gandalfr has the powers to successfully use any material designed and used for weaponry.
 * A Windalfr has the powers to communicate with and command animals.
 * The Heart of God ( リーヴスラシル) has the name meaning 'Life' in Ancient Helkeginian language. This familiar is technically a vessel for magical power used by Myozthirirn to fill up with magical power while Gandalfr guards the ritual. Then Windalfr will transport the vessel to where the enemy is and release the spell, resulting in the genocide of a entire race. This was done repeatedly 6,000 years ago when Brimir was forced to do so to prevent the Human race on Helkeginia from being erased . In Volume 7 Chapter 11, and also Volume 19 Chapter 7, Brimir revealed he was so guilt ridden over what he had to do to his 4th familiar he cannot bring himself to even speak this familiar's name.