White Metal

"Well, Amram has his Worthless, you have your Sunshine... my demonic power is called White Metal."

- Naomi Jeong

White Metal is the hereditary demonic ability used by members of the Astaroth Clan of Devils.

Summary
White Metal is an ability created by the original Astaroth after she had abandoned her angelic power in order to become an Archdemon. This ability was later implanted into the Devil she reincarnated and took as a consort named Tammuz, and from then on, the descendants she had begotten through him all inherited this ability, making it the hereditary ability of the Astaroth Clan.

Later on, as part of the Special Children ritual performed by a group of seven ancient Devils called the Sisters of Istehar, over 60 human children were fed the blood and ashes of the original Astaroth and slowly developed demonic power of their own, eventually gaining the power of White Metal sometimes in their puberty.

However, due to the Sisters of Istehar being slain in the 65th Hunger Game by Team DxD, the Special Children ritual has ended permanently and the last Special Child to possess this ability is Naomi Jeong.

Abilities
White Metal is a type of demonic power that, once perfected, will grant its users an immense advantage against both Devils and demonic creatures alike. It transforms their demonic energy into pure white light, similar to that of Angels and Fallen Angels, and allows the user to freely manipulate its shape and form it into numerous items, tools, and weapons. Unlike the light generated by Angels and Fallen Angels, however, this light lacks the innate holy energy within it, thus making it a "inferior" version of the stereotypical light weapons created by the Low-class Angels and Fallen Angels. Even those created by Ajuka Beelzebub, a descendant of Astaroth whose mastery over White Metal is only beneath Tammuz and Astaroth herself, are considered barely greater than the light generated by a Third-ranked Angel.

Due to the natural physiology and weaknesses of the Devil-kinds, this ability is considered to be one of the most dangerous abilities for a Devil to protect themself against, and, even while it is generally weaker than genuine angelic light, it is still capable of inflicting immense damage on Devils and demonic creatures alike.

In Chapter XXX, it is revealed that, in addition to being an extremely effective offensive ability when fighting against those of demonic origins, it can also be used defensively, as the constructs created with White Metal are capable of destroying the demonic attacks that they countered, although there is a certain limit for each construct before they begin to break.

In the same chapter, however, it is revealed that, unlike the majority of hereditary demonic powers, White Metal is considered harmful for even those of Astaroth's bloodline to handle, as despite their innate ability to use it, they are still Devils regardless, meaning they are not excluded from being hurt by its light when wielding it. The pain one feels when wielding it does lessen, according to Latia Astaroth, though it is only because the user has become familiar with the pain enough to unconsciously ignore it.

It is stated that the damage one receives from White Metal is different from Devil to Devil, based on the amount and quality of demonic power they possess. Pure-blooded Devils from the Astaroth Clan, however, do possess a slight resistance to it.

According to Naomi Jeong, based on her own experience, the ability required its users to not only possess a calculative and perfectionist mindset, but also great imagination so that their final work will be successfully created.

Azstar Blade
Azstar Blade is one of Ajuka Beelzebub's most powerful techniques and is deemed the "Great Satan-Killing Sword of Light" by the Old Satan Faction.

By creating White Metal while using his Kankara Formula to modify its characteristics and property, he creates a giant beam-like sword that can bypass all types and forms of demonic power, regardless of how powerful its origins are, as shown when it was able to dissect the group of Lotans created by Tsufaame Tereaku Leviathan, which were immune to any kind of attack beneath God-class in terms of raw power. He can also telekinetically control the movements of the sword from afar to precisely killing his enemies, and can even "break" the blade into numerous smaller beams to move between the obstacles and to attack his opponents from multiple directions.

He first developed this ability after years of training under Aldous, though he used it for the first time after he was forced to stop a berserk Sirzechs when he first entered his Human-shaped Aura of Destruction. However, due to his panicked state and a complete inexperience of the technique, he accidentally wounded both him and Sirzechs when he first used it. He later perfected this ability with the assistance of his teacher in fear of seeing his crush being hurt because of him again.

The most famous usage of this technique was in the Siege of Gusayn, when he used it to defeat Tsufaame Tereaku Leviathan in her Devil Trigger, which was said to be on-par with a Middle-Class Demon. Historical books later recorded this technique as the "blinding beacon of light that paved the way for the Anti-Satan Faction's victory..

In popular Devil media, this technique is dubbed the Heavenly Sword of the Demon King of Creation, especially in historical fictions and fictionalized retellings of the Devil Civil War.

Trivia

 * It is named "White Metal" because of the metallic shine they have under natural sunlight.
 * When created in the mortal world, these constructs will become stronger when Venus appears on the sky.
 * Those born under the protection of the White Tiger (Born in autumm, having the Metal Phase, etc.) are as affected by the White Metal as Devils and demonic creatures.
 * It is because of this that the Shinra Clan possesses a fear/contempt against the Astaroth Clan.