Nidhoggurthe cause of the world’s troubles and misery, eater of the dead and servant of Hel (the goddess of the underworld)
Nidhoggremains relatively harmless until Ragnarok begins, at which point he will burst forth from beneath Yggdrasil bearing all the corpses of the dead upon his wings
Nidhoggis also one of the only beings that will survive Ragnarok, perhaps to be a central force of evil in the new world that follows.
persuasion: If it's not working, you aren't using enough of it
Any man can make a mistake; only a fool keeps making the same one.