The Unofficial Skyrim Trivia Game!

[sinister]

Is it Bloated Man's Grotto?

[likelolwhat]

Nope.

[Ursula R. M.]

Soul Cairn?

[likelolwhat]

No. It will help if you can identify the "long-gone" referenced in there~

(I guess this is harder than I thought?)

edit~

One line refers to a unique item that can be found in this place.
One line refers to another, slightly less unique (three other copies) item that can be found in this place.
One line refers to a well-known bug related to a person in this place.
One line refers to a quest leading to this place.

*puppy dog eyes*

[Ursula R. M.]

DawnBreaker?
Meridia's Beacon quest?

My second guess (yes, I request two guesses??)
Red Eagle's Bane
Red Eagle books, etc.

[DarkEastwood]

Alduin's Wall?

[likelolwhat]

No, no and no. I guess this place is more obscure than I thought... or my way of thinking is so unique as to be useless.

*The "blades" line does NOT refer to Delphine/Esbern, or their predecessors, but literally metal blades.
*"Death's token" is ~something~ left after a person/creature dies.
*This place is in the base game, no DLC required.

I have one more clue to dole out in a few days and then I'm giving up.

[DarkEastwood]

Azura's Star?

[Snail's Pace]

Avanchnzel?

Spoiler:

"Blades in the hallway
Stay your hand until the time is right"

There's a spinning blades trap in one of the hallways.

"Your path is blocked,
Remove death's token"

According to the wiki, if From-Deepest-Fathoms is already dead, you can activate the "Unfathomable Depths" quest by taking the Lexicon from her coffin in Riften's Hall of the Dead.

"Go where the long-gone flocked"

Could refer to From-Deepest-Fathoms' former comrades.

[Aarah]

Is it the Twilight Sepulcher?

[mouser]

is it Walking Nightmare? the place being vaermina's temple. skull of corruption is the unique item. the book forbidden legend can be found there and sometimes erandur just freezes. also the people there are stuck in their sleep.

[Mattbott]

is it Cidna mine?

[likelolwhat]

Oops, I probably should have posted here that I was going on vacation. No one's got it yet, though Snail's Pace is the closest. In a way.

One last clue:

You go here as part of a quest, as I said before. This quest is part of a chain.

[Br3admax]

I was thinking Dawnstar Sanctuary, not so sure now.

[likelolwhat]

Gah you're close, so close, but I can't say in what way. Keep guessing, everyone, and put the clues together with the "you're close" hints!

[Spark]

has anyone said Mzulft? or maybe it's the ruins you go to in the MQ, that i cant remember the name of?

[likelolwhat]

Again, close but no cigar.

[Snail's Pace]

Raldbthar?

There's another spinning blade trap there, and several other clues seem consistent with the place, but I'm not sure.

[Chadonraz]

Finally finished reading through this thread.

I would have to agree with the above post; would've guessed Raldbthar myself.
Here's an analysis:

I am held in endless night,
No idea about this line
Blades in the hallway,
Blade traps, as mentioned by Snail's Pace
Stay your hand until the time is right,
Alain Dufont; if you kill him and later start the related DB quest, you cannot receive the optional objective of that quest
Crouch and sneak away.
Related to the previous line? There's also a Sneak skill book in that room
Your defenses are broken,
A stretch, but doesn't Aegisbane belong to Clan Shatter-Shield (shattered shield = broken defense)? Windhelm guards are always talking about it.
Your path is blocked,
The dungeon has two drawbridges you need to lower...
Remove death's token,
... and one of them requires removing various bones from jammed gears
Go where the long-gone flocked."
Reference to the entrance to Blackreach?

The unique item found in Raldbthar would be Aegisbane, while the less unique one would most likely be the Sneak skill book "2920, Last Seed, v8" (the Wiki lists four locations for it, so it would fit). Or maybe one of the four Aetherium Shards... although I have no idea how any of the lines could possibly refer to the shards.

[Snail's Pace]

If the answer is Raldbthar, I would like to pass my turn to Chadonraz, for that excellent analysis.

I am held in endless night

I was thinking this might be a reference to "Mourning [morning] Never Comes"...?

[Chadonraz]

That could definitely be it!

I've only ever done the DB questline thrice, so am not very familiar with the quests (or their names).

[likelolwhat]

Raldbthar is correct! Huzzah!

That was indeed an excellent analysis, Chadonraz! You were spot-on with most of it.

So here's the whole thing:

Spoiler:

I am held in endless night,
Mo(u)rning Never Comes, the Dark Brotherhood quest.
Blades in the hallway,
Spinning blade trap.
Stay your hand until the time is right,
The well known bug associated with killing Alain Dufont early.
Crouch and sneak away.
Sneak skill book in the same room.
Your defenses are broken,
Aegisbane. "Aegis" means shield -- it destroys them.
Your path is blocked,
Drawbridges towards the end of the ruin.
Remove death's token,
The bones.
Go where the long-gone flocked.
Raldbthar is also an entrance to Blackreach, ancient city of the Dwemer.

If Snail's Pace is willing to give up the next riddle, I'm passing the torch on to you, Chadonraz!

[Chadonraz]

I suppose it's true what they say; you learn something new every day. It didn't even occur to me that the name of the weapon (well, the 'aegis' part) might actually mean something.
Although come to think of it, I have in fact come across at least one shield that has 'aegis' in its name during my adventures.

Anyway, time for the next riddle I suppose. Really appreciate the gesture, Snail's Pace!

This is the very first riddle I have ever come up with, and I would be lying if I said I wasn't at least a little proud of it. Without further ado:

Never mourned and red or blue.
What am I?

[Aarah]

Yey! Someone got the riddle at last! Congrats!

I doubt this is right but...

The little flags on the Civil War Skyrim maps?

[Chadonraz]

Nope.