White Metal

White Metal is a hereditary demonic ability used by members of the Astaroth Clan and the Special Children.

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 the descendants she had begotten through him, it became the hereditary ability of the Astaroth Clan.

Later on, as parts of the Special Children ritual performed by the Seven Sisters, over 60 human children were fed demonic blood and gained the power of White Metal.

The current, living, Special Children who wield this power are Helia and Selas Whitelight.

Abilities
White Metal is a type of demonic technique that, once perfect, will grant its users great advantages angainst their fellow Devils, demonic beings, and dark creatures. It transforms their demonic energy into pure white light similar to that of Angels and Fallen Angels, though this light lacks the innate holy energy within it, and change them into various items, tools, and weapons. These light constructs are also capable of destroy demonic attacks that they counter, though there is a limit for them before they begin to break.

Unlike the majority of hereditary demonic powers, it requires the users to possess not only a calculative and perfectionist mindset, but also great imagination so that their final work will be succesfully created.

It is said to be a very difficult power for Devils, both to wield and to defend against, as light is the natural weakness of all Devils, demonic beings, and dark creatures, though those of Astaroth's bloodline will have better resistance toward it.

Despite this, these constructs are significantly weaker than the light constructs created using angelic energy of Angels and Fallen Angels. Even the weapons created by Ajuka, whose mastery of his White Metal is said to only beneath that of Tammuz and the original Astaroth, are below that of a Third-ranked Angels.

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

By concentrating his natural White Metal using his Kankara Formula, he creates a giant beam-like sword that can bypass all types and forms of demonic power. He can also telekinetically control the movement of the sword from afar to precisely killing his enemies, and can even "break" the blade into multiple smaller beams to move between obstacles and to attack his opponents from multiple directions.

He first developed this ability after years of training under Aldous Beelzebub, 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. While he was unable to control its power and accidentally injured both him and Sirzechs when he first used it, he later perfected this technique with the assistance of his teacher in fear of seeing his crush being hurt because of him again.

The second and most famous usage of this technique was in the Siege of Gusayn, when he used it to defeat Tsufaame Tereaku Leviathan in her True Form. Historical books later recorded this technique as a "blinding beacon of light that paved the way for the Anti-Satan Faction's victory.

It is also known in popular Devil media as the Heavenly Sword of the Demon King of Creation.

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, demonic beings, and dark creatures.