The Lower Karazhan. A very much unknown and closed off area that is In-Game. It is only accessible via Exploits. Very little is know about the Zone.
Lorewise, it is believed to be the Up-Side-Down Karazhan that was shown in the book The Last Guardian. But due to the fact, it look nothing like the inside of Karazhan, and bears heavy resemblence to a Crypt, this is unlikely.
Gameplay wise, it could've been a planned Instance/Raid that got cut due to probably raising the games Rating. Or could've been a questing area, seeing how there is a complete outdoor instance In-Game and no Instance Portal.
<Below is Detailed Information about the Crypt>
Video about The Lower Karazhan.
http://www.youtube.com/watch?v=tHEKQoSv_E8
How to get into The Lower Karazhan. (Do at your own risk)
http://www.youtube.com/watch?v=U__0QeRO4CI
(Information provided by TSLVideos)
==Zones==
There are a total of six zones within the crypts underneath Karazhan, each more gruesome than the last. The following speculation, and is just information through observation.
- Well of the Forgotten: This location is fairly plain, and is the first area you see as you enter. There is a tomb of unknown origins, in addition to a well that leads to the pit of criminals. It is evident that criminal corpses were tossed down the well in order to dispose of them, although the definition of "criminal" is unknown, nor if this area was under direct rule by Medivh.
- The Pauper's Walk: Possibly the largest of the six zones, the Pauper's Walk extends to nearly all other areas in the crypt, and is littered with skeletons, mummified bodies, and bones. The name appears to allude to its usage. A pauper, or literally a very poor individual, would make primary use of the area. Whether the lower class were paid to work in this pseudo-hell, or were led to their death, is unclear.
Various doors and gates appear in this area as well, all of which lead to nothing. This adds to the possibility that Blizzard has yet to finish Lower Karazhan. Many of the doors appear with odd names such as Doodad_WroughtIronDoor05, again demonstrating it's obvious incompleteness.
- The Pit of Criminals: As mentioned in the previous section, the Pit of Criminals holds a massive pile of aged bones. Corpses were thrown down into the well, either to hide or to dispose of. A double staircase leads to an empty room, which through time appears to have partially caved-in.
- Tome of the Unrepentant: The most confusing of areas, the Tome of the Unrepentant is a large hall with a still-water pond and multiple access points from above. A tome is a large scholarly book, and there is not a single literary work to be found.
A possible reference to Keli'dan the Breaker is made, as he drops the [[Leggings of the Unrepentant]] in heroic Blood Furnace. The connection between him and this zone is, however, unlikely.
- The Upside-down Sinners: Possibly the most horrific zone in all of World of Warcraft, the Upside-down sinners is located underwater, just past the Pauper's Walk. In the murky water, chains and hooks string up men who hang with their feet to the ceiling. Their bodies untouched by time and unidentifiably mummified each retell a dark story of the games past.
This area makes the possibility of Lower Karazhan becoming an instance uncertain, as nothing this grim has ever been seen.
The Slough of Dispair: This area is a large room with nothing in it, comprising of a pit sprinkled with bones. Despite being uneventful to visit, the broadness of it's name causes it to be the most interesting. A slough contains two definitions of interest; 1) a muddy pit full of wet or soggy ground; 2) a condition of degradation, despair, or helplessness. (dictionary.com). The word "slough" quite literally describes the appearance of the room, but also oddly enough relates to the second word as well, making it "the Despair of Dispair".
Looking at the word "dispair", it first appeared to be incorrectly spelled. However, the terms dispair means the separation of a pair.
So finally, looking at the title again, it is saying "the despair of being separated". Perhaps married couples were killed here, or something major in lore occurred at this very spot. Either way, the empty room will impress lore-fans everywhere.
This area could be accessed via dying close to the gate and running through it, but this was changed in Patch 2.0. However, entry is still possible through dueling and being sheeped or feared into the zone (no longer possible), as well as through Warlock summons if there are already present inside.