Underdark Campaign - looking for ideas, resources

Mercurius

Legend
I'm planning an Underdark-based "mega-adventure" in my homebrew world and am looking for advice, ideas, book recommendations, etc. I am co-DMing and the other DM was going to take the characters from 5th to about 8th level, then my Underdark sequence would go from about 9th to 12th or beyond, but it may be that it has to start sooner than that--at 6th level up to about 10th.

The basic gist is that the "Dark Realms" are virtually unexplored, except by a race of dwarves who speak of "shadow elves" and various monstrosities miles below the surface. The world above is recovering from a long apocalypse in which the speaking races had to hide within safehaven for centuries and only recently--about 150 years ago--came out and started re-establishing civilization (similar to Earthdawn).

I haven' figured out what the core plot line of this leg of the campiagn is--which is partially why I'm posting this--but there are a few elements that I'm working with and want to incorporate:


  • Dark elves. They are unknown in the world above but will play a large role once the PCs get deep enough. They are actually the descendents of elves who abandoned their "tainted" children millenia ago, who fled into the earth and were taken in by Lleothma, the Spider Goddess. They, of course, seek to enact their revenge.
  • "Onion layers of evil." Imprisoned within the center of the world is a sleeping primordial deity of immense power whose influence emanates outward. This being influences some kind of elder beings, who in turn influence aboleths, who in turn influence illithids, who in turn influence the dark elves, their enslaved dark dwarves, goblins, etc. This deity isn't necessarily "evil," just very alien and powerful; the aboleths (and/or whomever they serve) seek to awaken it, which could bring about the end of the world.
  • "Journey to the Center of the Earth." I like the idea of an extended underground expedition that goes deeper and deeper and deeper...this aspect of the campaign would be, to some extent, exploration for the sake of exploration--it would entail discovering new (and often bizarre) caverns, races, creatures, etc.
Also, what books do you recommend? I have the Paizo book, Into the Darklands, as well as the 3ed Forgotten Realms book, The Underdark. And of course I'm familiar with the classic "D" and "Q" series from 1ed AD&D. Any other good supplements? What about adventures?

At this point I'm just brainstorming ideas (much of what I wrote above was on-the-fly as I wrote this post, and thus am not tied to anything).
 

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Also, what books do you recommend? I have the Paizo book, Into the Darklands, as well as the 3ed Forgotten Realms book, The Underdark. And of course I'm familiar with the classic "D" and "Q" series from 1ed AD&D. Any other good supplements? What about adventures?

Well, the "night below" adventure from 2E is completely set in the underdak. Lots of good adventures / ideas even if the edition is different.
 

There are at least a billion books on the Underdark, several in 2e and 3e. So there are resources out there. Paizo's book "Darklands" is also out there - it even does the "Journey to the Center of the Earth" where it has some weird places at the very bottom.

My favorite Underdark villains are the less common used ones: Cloakers and Grimlocks. Cloakers are just odd and no one really expects them. Grimlocks though can be creepy with some mood readjustment.

My grimlocks are religious cannibals: eating the flesh of others is a religious exercise, and in that, they are fanatics. They believe that fear marinates the flesh, so they exercise terror: A hunting pack of Grimlocks involves the creatures swinging and scuttling along the caverns walls, beating drums so that you hear them coming. They use spells that create mists and strike their targets blind or deaf, so the prey is unable to preceive its death coming. The Grimlocks take drag their victims back to cooking sites scattered around the Underdark like shrines, where they cook the victim alive.
 
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Rechan (and others) what are the best Underdark adventures, in your opinion? What inspire that sense of wonder and exploration? That's what I'm going for, with a strong dose of Unspeakable Evils and degenerate races ;)
 

My grimlocks are religious cannibals: eating the flesh of others is a religious exercise, and in that, they are fanatics. They believe that fear marinates the flesh, so they exercise terror: A hunting pack of Grimlocks involves the creatures swinging along the caverns, beating drums so that you hear them coming. They use spells that create mists and strike their targets blind or deaf, so the prey is unable to preceive its death coming. The Grimlocks take drag their victims back to cooking sites scattered around the Underdark like shrines, where they cook the victim alive.

I hope you take this as a compliment, but I am stealing this idea.

Damn this made my day and its only one hour in!
 

There are some side treks online for City of the spider Queen that you could steal. I like the giant squashed into the crawl space idea - smelly...

I hope you take this as a compliment, but I am stealing this idea.

Damn this made my day and its only one hour in!

.
 

I didn't see anyone mention the 3.5 book Drow of the Underdark. It's actually pretty good and has info about exploring the Underdark.

There's a few Dragon Magazines that have info on Drow & the Underdark.

I just got done running an Underdark scenario. The only thing I wished I mentioned more that I forgot about were crystal caverns. I used several mushroom caverns and mushroom forests. I just never included "crystals" in my descriptions and layout of various caverns.
 

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