Lucifer's Crown

Lucfier's Crown (ルシファーズクラウン Rushifāzu Kuraun), also known as The Devil King's Mantle, is a Sacred Gear with the abilities of the 72 Pillars.

Summary
A strong demonic-originating Sacred Gear, some have therized that is the manifestation of Lucfier's power in Sacred Gear form, hence where they think it's name hails from.

Even without that theory, it is a powerful Sacred Gear with it's powers of the 72 Pillars, giving it's user a large amount of powers to call on.

In the Just a Subject continuity it is wielded by Yashiro Itori.

Abilities
Lucifer's Crown's abilities are those of the 72 Pillars, giving a wide-range of and all purpose abilites for multiple situations.

To use the seperate abilties, the user must speak the name of the Pillar the abilitity belongs to.

Bael: Power of Destruction.

Agares: Time manipulation.

Vassago: Can find any lost or hidden artifacts or treasure.

Valefar: Manipulation of object's shadows.

Paimon: Charisma which charms females and males.

Buer: Strong healing abilities.

Sitri: Water manipulation.

Bathin: Teleportation.

Aim: Grants control over magic resulting in explosions.

Glasya-Labolas: Grants invisibility.

Buné: Dragon taming.

Berith: Control of black demonic flames.

Astaroth: Summoning and control over snakes of all kinds.

Furfur: Control over storms and tempests.

Phenex: Immortality and regeneration.

Halphas: Can summon weapons and armor.

Shax: Ability stealing.

Furcas: Horse taming.

Murmur: Can call on deceased souls as familiars.

Orobas: Foretelling of coming events.

Andras: Installing negative emotions into a person or being.

Belial: Nullification of abilities of people or objects.

Dantalion: Energy absorption.

Forms
While not being an actual crown or having a physical apparance, Lucifer's Crown shows itself with markings on the user's body and turing one of their eyes crimson red.

Awakening of A Devil
Awakening of A Devil, also known as The Flowing Blood of A Devil King, is the Balance Breaker of Lucifer's Crown. Injecting the user's body wth blood of a Maou, the user sprouts thick black devil wings, their eyes turn amber, and their hair gains a whitish tinge. The blood injected into them gives the user powers of a Devil on a Maou level, turing them into beasts of combat and power

Trivia

 * While some of the abilities here are canon in normal DxD, some I had to make up from reading descriptions from the Ars Goetia, and some I found here.
 * This Sacred Gear serves as a counter to the angelic Sacred Gear, Mechanical Angel.
 * This is the second Sacred Gear to be a counter of one of Hanten's Sacred Gears.
 * Now someone just has to make a Fallen Angel based Sacred Gear, and we will have a trifecta of Three Faction Gears.