The Octopedal Equine is all yours, my friend... Naturally, for Norse Mythology, I've gone for the Big Dog option...
Fenris, also known as Fenric or Fafnir, the Great Demon Wolf God...
Norse Mythology 101, for anyone who isn't familiar with things demented Vikings believed in...
For many ages, the Great Wolf, Fenris, was the loyal Guardian of the Gods' realm of Asgard. Massively powerful, Fenris destroyed any enemy that dared threaten Asgard's gates.
But, one day, with blistering idiocy, after far too many adult beverages in the Feast Halls of Valhalla, a cabal of drunken Vanir, led by the even more drunken Aesir Thor and Tyr, decided in their inebriated cretinism, to trick the Great Wolf, chaining it to the Great Ash Tree, Yggdrassil, which supported all life. Being both drunk and stupid, Thor and Tyr then proceeded to poke Fenris with sharp sticks and generally torment the poor beast cruelly - some thanks for ages of service...
Not unnaturally, Fenris eventually became enraged and thus shattered the chains, tearing the Great Ash Tree up by its roots and going on an immediate rampage of epic destruction - as you do in such circumstances - killing everyone in its path.
This led to the devastating Final War of Ragnarok, the apocalypse that ended the realms of Men and Gods alike, brought about the Fall of Asgard and got everyone completely mushed...
The moral of this story is twofold.
First, always keep idiots and alcohol separate - and second... NEVER mess with BIG DOGS!
The PHoD Fenris Wolf should, by rights, be bigger. I mean, if the Viking myths are accurate, this thing is like the Canine equivalent of Gojira.
But I decided to keep it moderately small(ish) for simple reasons of practicality within the constraints of NWN. There's not much point in interacting with a colossal paw or having a Creature model so big it just gets stuck everywhere and anywhere you try putting it and is thus precisely no use for anything except getting in the way.
Since I'll doubtless end up adding it to the small, eclectic pack of very unusual Big Dogs that Lucirath owns in Demoness Tales, I scaled it accordingly. You can thus actually interact with it in your Modules... assuming you want to interact with something with Nuclear Death Hackles!
Just don't get wrecked and try tying it to a tree - trust me, you really don't want to go there!