Niðhöggr

Níðhöggr is an Evil Dragon known as the Abyss Rage Dragon and a member of Qlippoth.

Appearance
Níðhöggr is black colored Eastern Dragon. He is describe as to having a large body about 20 meters long and a khaki colored belly, despite its snake-like appearance, it has four limbs and four wings. It's also mention to have eerily drooling fluids coming from its huge mouth.

Personality
He's describe as a Dragon full of greed because he's always hungry that he swallows everything in sight, he has even shown to be a cannibal, as he desired to eat a Dragon egg. Níðhöggr is a sadistic Dragon, taking pleasure in brutally beating others, he also has a deep sense of vindictiveness.

History
In the past, Níðhöggr lived in Northern Europe. He has even met Ddraig at some point before he was sealed.

According to records, its last known appearance was when he was defeated several hundred years ago, it's unknown Whether it resurrected itself or through the Holy Grail.

The Legend of Oppai Dragon and his Lively Companions
Níðhöggr made its official appearance in Volume 20, when he infiltrated the underground space in the Hyoudou Residence and nearly beating Ophis to death while holding Issei's parents as hostages, whom he kidnapped after he escaped when Crom Cruach appeared. Níðhöggr later appeared on Agreas where he fought against the Occult Research Club but was constantly taking powerful blows and unable to fight back against them, mostly from an angered Issei. He manages to get back up using Phenex Tears, however he was overwhelmed again when Crom Cruach appeared to senselessly beat him up and lets Issei and Asia pass, Níðhöggr tries to attack them only to be dispersed by Crom Cruach's aura. Crom Cruach intimidates Níðhöggr stating that he will kill him a hundred times over chase him down relentlessly until his consciousness perishes.

Powers & Abilities
Magic Talent: Níðhöggr is capable of casting defensive and offensive magic spells.

Self-Resurrection: It's said that because of his greed, Níðhöggr is capable of reviving itself to some degree, even capable of survive Ragnarok.

Miasma: Níðhöggr can produce black corrosive clouds from its body that can cause damage anyone as soon as it touches them.