dendar obd
Put together Jörmungandr and Apep and this is what you get

 

Name: Dendar The Night Serpent, Nidhogg
Origin: Forgotten Realms [D&D]
Gender: Female
Classification: Elder evil, Primordial
Age: Unknown, came into existance when a sentient being had the first nightmare
Powers and Abilities: Superhuman physical traits, immortality (type 4, more of an abstarct being), regeneration (Mid-low, if killed she reforms after some time), enhanced senses, shadow manipulation, mind manipulation (has a lot of differernt ways to do this), dimension hopping, is immune to poison, mind manipulation, death magic, transmutation, also resistant to various elemental effects and magic. | All of the above to a much higher extent in addition to flight
Weaknesses: Epic and good aligned magical weapons | None notable
Destructive Capacity: Country level (More powerful than Ragnorra, considered stronger than entire groups of top-tier angels or demons) | At least Star level, and likely far higher (ate the sun at one point, comparable to gods)
Range: Several dozens of meters with abilities, can move between dimensions | Inter-planetary, multiversal with nightmare manipulation
Speed: Massively Hypersonic+ reaction/combat speed (superior to Ragnorra) | Likely FTL (due to sheer size)
Durability: Country level | At least Star level+ (Much larger than the sun), likely higher
Lifting Strength: Unknown
Striking Strength: Class ZJ | Class XGJ+
Stamina: Vastly superhuman | Nigh-limitless
Standard Equipment: None
Intelligence: Superhuman
Notable Attacks/Techniques:

- Stuff of Nightmares: Dendar feeds on nightmares, the more she consumes the more powerful she becomes, to the degree that at some point she grew large enough to swallow the sun. Due to this she can manipulate nightmares to an extreme degree. So much so that gods and men alike can be affected by her abilities. Dendar's scales each contain nightmares she consumed, when damaged these scales fall off releasing said nightmares that afflict the attacker. In addition' Dendar's fangs are coated with nightmare venom that sends the afflicted into a nightmare ridden coma. finally Dendar can actually vomit nightmares at her enemies driving them insane. In order to reverse any of these effects you actually need reality warping (and thats for her base form)

Notable OBD Victories:

Notable OBD Losses:

Other:

Key: Base | Shadow Epoch