Stitched together the 3-minute dungeon...
Contributor ideas keyed as follows...
This dungeon is entirely vertical. (K) The bottom is down, the top is up, the left is west, the right is east.
The Forgotten House of C'ielrak
Demogorgon's realm is composed entirely of the bodies of lesser gods he has slain. This is one of the lowest houses, once belonging to one of Demogorgon's concubines (a horrific eye-creature). Largely forgotten. It intersects our reality at one point...
1.Behind a nondescript door in a nondescript alleyway, steps head up into the dungeon.K The jagged stairs are ice TC (the ice is made from frozen tears), the gates, as rest of building, are made of blocks of frozen blood CL
2.Chairs carved from giant-sized molars CL
3. Horror eye-creature (emptied physical remains of concubine) stuck to wall with spiderweb. 3 Spiders feeding off it. scuttle away when disturbed. TB
4. Sweet nothings H5 issue form this room. This room has (flesh eating) moss producing air (for the dungeon.) TC a heat-seaking nanoswarm D of carnivorous enzymes
will attack intruders. Underground stream through wall on left. Other small tunnels.
5 Storage of flesh (which is feed to the moss.)TC Dead end with giant worm and 500 gp R.
6 Lost children. D (they wander here, if their parents are wicked and the world does not care for them). They tend and feed the Spider Queen's (replaceable) Heads TC (if you've ever wondered where the spider queen keeps all her heads).
7 Twisty passage--chance of insanity R, due to: singing floor in this mirrored hallway TC--(step creates notes, each one a different distorting effect)--paintings of art critics
that move, critique passersby CL (carping lesser demons, banished here shortly after The Fall, they could do naught but criticize--they will savagely critique PCs roleplaying)
(secret door is behind the last painting)
8 Vortex D (force stronger than gravity pulls up, through) knives TB (inhabit the air, spinning lazily, when ceremonial sacrifice knives from aeons past rust, they rematerialize here)
Lots and lots of marbles H5 (coat the walls) insanity provoking paintings R (the critical demons have placed their favorite artworks here)
9 Three wizards (The councilors. D) in red black white robes sit contemplating. Don’t disturb! R (they are millennia-old, they are meditating on how to safely approach the upper reaches
of Demogorgon's realm) they have been contemplating bottled memories stolen from the elderly CL (former adventurers who failed) and a partially annhihlilated thaumaturgic hex sign Z
for hundreds of years. They will caution the PCs to go no further, but each has a 33% chance of being able to answer any questions about the Realm the PCs may ask.
10 A white marble Roman style bath room, only the bath is full of hot blood taken from the first monster type rolled on a mountain/snow random encounter chart K on the walls are
sentient abstract erotic paintings--peep show sex slaves TC. These slightly mobile and slightly 3-dimensional paintings entrap the souls of Demogorgon's rivals. They are forced into bodiless
states where they are forced to eternally witness such frolickings as may occur in the bath. Their moaning slowly erodes mortal minds. Only fresh bloodshed will reveal or open the secret door..
11. A slime lord 99 Z made of purple mold H5 banished here. (It will attack, may bargain for its freedom, but must devour one level from a living creature per round whilst outside this
12 Hall is lips. (50 gibbering mouthers)(more doomed souls) TC (careful listening will reveal) that the ones on the floor despise the ones on the walls Z killing all of ones on the floor will appease the walls and vice versa.
13 This bottomless pit (shown on map from above) is flooded. Somewhere a Sea is missing. TC 4 miles down, the mind of the dead concubine (insane)... talks a lot. D tortured eternally on
a rack of unknown and unanticipaable tortures Z the only other "living" thing here is an Undead Wererat with No eyes. Walls clawed to hell. (shredded suit and filth.)TB above the water level
are spiral stairs which open up behind a bookcase in the city library. K
14 Above: Floating Eye-blobs of darkness. Repel light. Steal Dreams. (1% chance of going mad per round spent in the chamber every time PC sleeps forever after) TB
Below is: boiling oil. Eruption chance.D (beneath the oil is the) chronogrotesquerie Z (banished here because it was too chaotically disruptive even for the Demon Prince,
it is dangerous, but its time-alteration abilities can perhaps be harnessed by PCs if they feed it properly).
15 A spherical room made of a smooth white substance (rune-covered flesh-TC) An item of great value hovers in the dead centre of the sphere. K Properly reading the runes allows
passage to another part of Demogorgon's realm. Improperly reading them causes madness. The item (an anticrystal) was dropped by His Majesty...
16 His Majesty (is a perverse mage. Chaotic Evil.)TC eating a death bone beetle beast feast Z (the mage was once one of the councillors in room 9. He became impatient
and ran ahead, went mad, and is convinced that he is the ruler of a vast empire and that this is his throne room. He fears the slime lord outside and has been "feasting"
on undead insects for decades.