Diabolos Dragon

Diabolos Dragon is the second upgraded form of the Scale Mail after Issei and Vali borrows the power of Ophis.

Diabolos Dragon God

 * Infinity Blaster: A further enhanced version of Crimson Blaster, the wings contain cannons that shoot out a powerful blast of red and black aura that leaves even Rizevim injured to a extent that his body is almost fatally damaged.


 * Longinus Smasher: the form not only is capable of this move, but the blast it shoots out has been enhanced with the power of infinity, delivering further damage, it can also be used in tandem with the infinity Blaster.


 * Blazing Inferno of Scoring Flames: An ability that was sealed by the God of the Bible which Issei managed to unlock upon using his DxD form for the second time in Volume 21. Issei releases a powerful breath of fire which can incinerate anything, flames that never go out once ignited as they continue to burn even after being reduced to ashes and can probably burn the soul, until nothing remains. The only existence that was known to be immune to the flames was Albion, Ophis and Great Red.

Diabolos Dragon Lucifer

 * Reduce: The wyverns begin to release Albion's Reduce poison, which has the ability to cause a powerful poison that affects even Gods, unique immune to this skill are Ddraig, Great Red and Ophis.


 * Satan Compression Divider: Vali releases a burst of Slivery-white and jet-black streams of demonic radiance that instantly compressed anything caught in it over and over again, until eventually eliminated.


 * Satan Lucifer Smasher: An enhanced version of Longinus Smasher, the armor opens from the abdomen and fires a massive bombardment of sliver-white and jet-black aura.

Chants
Issei and Ophis alternate lines when chanting the Diabolos Dragon God chant.

Issei:I, The Crimson Red Dragon dwelling within me, awaken from your dominance  Ophis:The Crimson Heavenly Dragon I possess within me, rise up to become a King Ophis:The jet-black God of Infinity Issei:The glorious Red God of Dreams Both:Watch over the forbidden existence we shall become that transcends the boundaries Both:We shall dance like radiance within the inferno

Vali, Albion, and Ophis alternate lines when chanting the Diabolos Dragon Lucifer chant.

Vali:The pure White Dragon dwelling within me, rise up from your supremacy Albion:The silvery-white Morning Star I possess within me, claim the throne of Dawn Ophis:The jet-black God of Infinity Vali:The mysterious and unfathomable father of Devils Vali and Albion:We shall transcend the limits to accept the oath All:Thou shalt kneel down before our bright and glorious existence!