Mysteries of the Worm:
Like layers of an onion, so are the Days of Our Tears!...
There are several good sources of info, for this:
Go Cthonic with it (your wife will LOVE you)!
De Vermis Mysterious, being translated, is "Mysteries of the Worm". Any decent library of Cthulhu will have a copy (just ask Cthulhu's Librarian)! It was also referenced at the beginning of
Hellboy, and is oft-mentioned by the ancient Seer Luveh-Keraph, Priest of Cryptic Bast. Surely the DoD picked up a copy in Nacreous. They could learn much of the Worms, therein, but it is similar to the
Necronomicon, in that it drives characters of less than 12th level insane, and is sanity-blighting for most readers (See the 1e
Deities and Demigods, under the Cthulhu mythos - have you found the Elder Sign?)
This is good for many reasons, as Elder (& Co.) have always reminded me of Lovecraft's Cthonians, burrowing through the earth, gnawing it for some, unknown, reason... They can cause earthquakes, and lay rock-like eggs which eventually hatch diminutive babies.
Perhaps they gnaw the world to change its orbit, to bring it under the right stars... Or, perhaps they gnaw it to cause it to break up, destroying all other life on the planet. Lovecraft's Dholes seem to like dead worlds...
Another source for info is the mind of our favorite Mad Monk, Rasputin Stone-Bear! That Worm was in his head for a looooooonnnggg time!... Surely it must have left SOME refuse! With his self-discipline, and the aid of a powerful Psychic, perhaps they could gain some useful clues, like a Ranger looking at critter scat...
And those Worms have been up to something... We don't know what, yet, but we do know that they've BOTH been up to more than just lying still... Wandering somewhere in the Underdark, madder than a hatter (who go mad because mercury was used to stiffen hat-brims, just in case you didn't know, this slowly poisoning them) is a witlessly-scared Deep Gnome, with the misfortune to have run into one of them!... He can't tell you much (even after the application of a
Heal spell cast especially for the purpose of curing madness, and stopping his jibbering), but what he CAN tell the DoD is where one of them was, a short time ago (and any other info he saw, in his last, brief flashes of sanity, which he probably doesn't understand the signifigance of... Say! Didn't Priggle once say something about a Deep Gnome missing from his village?)
What about the force of creation, for Spira? The gods entered after hearing the death-throes of the last living creature... Who made them? Is he/she/it dead? If not, he/she/it was a witness to the whole thing. Also, there must have been a god of death, there, too... Did he/she/it die? (That is not dead which can eternal lie; and with strange aeons, even Death may die...) And the force of Entropy? Surely it has been around, all that time... if it can be communicated with... (see below).
Any form of Immortals are also likely candidates. Also, the gods of Spira locked the Worms away, so they should have plenty of knowledge about them (at least the ones already "seated", or ascended, before that time). Perhaps not Calphas, Aeo

s, nor Galanna, but somebody...
Also, I find it odd that Imbindarla's portfolio hasn't been filled... Sure, the D(a/o)rk Hunger swiped the Undead portion, but the crawling things?... That obviously went somewhere ELSE! (Now I wonder who would be interested in THAT?)!! Does the phrase "The Crawling Chaos" ring any bells? Maybe... a WORM?!?
Also, see the 1e Melnibonean Mythos, and look up the Vulture-Lions... These were the "Creatures of Matik", who was an ancient Melnibonean Sorcerer-King. He went to Limbo, and formed them directly out of Chaos, itself. Anyone of noble Melnibonean blood is supposed to be able to command them... Where is Eve a Princess from, again? Does she speak High Melnibonean? If so, she could probably wander into Limbo (now that the Slaadi are all invading Mechanus), and find some of Matik's Creatures to question... Since Melnibone' was in the world that came before, perhaps the Creatures of Matik, who were formed there, know somewhat of the Worms that Arioch unleashed in the battles that destroyed it...
Then there are the dead gods... Ever read
Godstalk, or
A Rage of Rathorns? The city in the first novel had a "Feast of Dead Gods", yearly, in which dead gods got to come back, for one night. Elric also ran into Darnizhan, one of the dead gods, who was still quite capable, despite his medical condition... Maybe the DoD could find one of these sorts, for better or worse? (Where's Nolin's high Diplomacy, when you need it?)
Of course, the
Necronomicon, the "Book of Dead Names", or "Book of the Names of the Dead" will probably have to be consulted, extensively... That's not a good thing! It's a good thing that (most of?) the DoD are above 12th level, eh?
So, see anything you like, yet?
