The Stone Keep also known as the Mist Form Dungeon was a 'dungeon' area featured in Blood Omen: Legacy of Kain which contained the Mist Form ability. The keep consisted of a stone tower located on the northern banks of the Lake of the Dead.
Nearby Kain found the Stone Keep, its entrance blocked by a tree. Using the axes to chop it down, Kain entered the structure discovered an indoor dungeon within. Much of the interior of the structure was partially ruined and flooded with murky water, but shortly after entering Kain discovered the Mist Form card atop a floor mural of the ability and nearby he found a save altar for him to use. Unfortunately upon entering the door locked behind him and forced him to push on through flooded rooms to the end of the passage, allowing him to test the Mist abilities such as drifting over Water, passing through Permeable barriers avoiding enemies, his invulnerability to physical attacks (and vulnerability to magical ones), as well as discovering the hazards of Vortexes. In the final room Kain discovered a teleporter pad to return to the initial room of the structure which now allowed him to exit the building.[Blood Omen][Blood Omen/6][Blood Omen strategy guide]
The external appearance of the Mist Form Dungeon consisted of a rectangular keep on a trail to the northeast of the Lake of the Dead in the eastern lake area. The design of the building was reminiscent of the other buildings in the western Termogent Forest, such as the Control Mind Dungeon, Blood Gout Dungeon and the Flame Sword Dungeon, consisting of a pale-red brick ramparted building complete with crenelation and a flat roof, evocative of a medieval castle-like structure. Unlike its counterparts, the Mist Form Dungeon did not appear to be ruined externally and from outside seemed largely intact. A tree blocked the doorway in the center of the ground level and four arrowslits could be observed mid way up the building, along with a trapdoor on the southwestern corner of the roof.[Blood Omen][Blood Omen/6][Blood Omen strategy guide]
The internal area of the keep appeared far less maintained and shared many design features with 'sewer' areas, with a pale green and yellow trimmed color scheme, wooden supports and pillars, brown doorways and murkywater flooding many of the areas.[Blood Omen][Blood Omen/6][Blood Omen strategy guide] The keep was divided into seven map areas:
The first area consisted of three square rooms in succession. The first room was bore the Mist Form item card in the center and had a door on the western wall which led to another square room containing a save altar (which constituted the only room of the second map area). On the northern was a closed door which acted as a permeable barrier flanked with four statues which led onto the next room. The second room was partially flooded apart from two patches in the east and west of the room where two miners were situated. A number of skulls could be observed on the floor and a large open door in the north led to the next room. The third room was flooded only in patches in the north and south with a large permeable door leading to the next map area.[Blood Omen][Blood Omen/6][Blood Omen strategy guide]
The next map area was again a succession of square and rectangular areas, partially flooded and necessitating the use of the Mist Form. The first room began in a small square alcove bordered by wooden beams which opened into a larger rectangular area that was completely flooded, with a shooter at either side and a central pillar supporting a wooden beam in the middle of the chamber. A permeable door on a small island at the north of the chamber led to the next room - a square room containing two Vortexes and another permeable door to the north.The third room was another flooded area with small islands around the entry and exit gates in the north and south. This time four shooters were positioned in an irregular pattern along the walls and a single skull floated in the center in front of a central beam-supporting pillar. The northern door led to the next map area.[Blood Omen][Blood Omen/6][Blood Omen strategy guide]
The fourth map area began in a small square alcove bordered by wooden beams and opened into a wider rectangular flooded area with two Liches positioned on islands in the east and west. An open passage north led into a larger square room with solid ground patrolled by two Zombies with three shooters positioned around the room. An opening to the north split by a central beam pillar led into a final square area which contain a jutting overlooking balcony containing two Energy bank artifacts. Cracks beneath the balcony led to one passage into the next room, otherwise a pair of staircases either side led up to the back of the balcony at the north of the room, which was protected by a number of green railings - which could be passed back through with mist to reach the jutting balcony and Energy Banks. The permeable door to the north led to the next map area.[Blood Omen][Blood Omen/6][Blood Omen strategy guide]
The fifth map area was a wide open room overlooking a flooded area in the center. At the beginning of the room a square railing enclosure contained two Liches protecting two Heart of Darkness artifacts. Most of the north of the room was taken by the enclosed lower tier flooded area, with the upper pathways reduced to balconies around the sides of the room. The middle lower tier - accessible only through the cracks in the previous map area - was mostly flooded and contained a jutting balcony section and a central beam pillar in front of an island at the back which housed a Rune triangle and a blood vial. The top corners of the upper balconies were guarded by Shadows, protecting the passage to the permeable exit door in the middle of the northern wall, which led onto the next map area.[Blood Omen][Blood Omen/6][Blood Omen strategy guide]
The sixth map area again consisted of several interlocking square rooms, with the first being a rectangular room with the exit blocked by a set of spikes. A floor button nearby that was disguised as a chain set these in motion providing 'waves' of lowered areas that allowed Kain to pass into the next room. The next room was a wider square room with a blue magic sphere in the center. Just beyond the sphere was a large bank of spikes and Spike pits which prevented access, except for two trails which lowered spikes in opposing waving patterns (due to the activation of the floor button). Both trails led to Vortexes at either side of a central beam pillar, so it was necessary to change from Mist back to regular form before the end. The final part of the area, was a wide rectangular area with a prisoner at either side. The exit door to the north was open but filled with unmoving spikes necessitating the use of Mist to pass through to the next map area.[Blood Omen][Blood Omen/6][Blood Omen strategy guide]
The final map area again consisted of interlocking square and rectangular rooms and began in a small square alcove bordered by wooden beams which opened out into a wider rectangular area that was partially flooded, with two islands at the east and west connected by a thin strip of path between them which contained two Wenches and two Barkeeps in ghost form. An opening to the north led through to a large square area containing several tombstones, skulls and disturbed earth populated by two more Wenches and Barkeeps in ghost form. Behind a central beam pillar to the north lay a small rectangular area containing a lever which opened the locked door behind it. This opened the way to a small partially flooded square room containing a Teleporter which led back to the first room of the building.[Blood Omen][Blood Omen/6][Blood Omen strategy guide]
The area containing the Stone Keep and the Eastern end of the Lake of the Dead is listed in files as "Map 0001 Sect 0033", with the neighboring area containing the rest of the lake listed as "Map 0001 Sect 0032" - as with other areas the "Map 0001" designation refers to external locations. The interior areas of the Stone Keep are all designated as "Map 0022", with the individual rooms or areas listed as "Sect 40", "Sect 50", "Sect 51", "Sect 52", "Sect 53", "Sect 54" and "Sect 66". In the Developers' level select the area is listed as "Mist" and is grouped with other areas surrounding the Oracle's Cave under "OL4" - despite fitting narratively with the next chapter.[Blood Omen][2]
The initial area of the Stone Keep that Kain returns to after using the teleporter appears to be a different area to the one he departed from. The end area notably has an extra area of the room where the return pad appears that was not present before. The room still links up with the outside world the same, but the doors to the rest of the keep are completely barred, preventing access to the areas inside the keep and forcing Kain to exit. Despite these differences the map still interprets the area as the same tile as before ("Map 0022 Sect 50"), presumably meaning the extra area was merely obscured - indeed lighting for the area can be seen on the 'plain' version of the tile.[Blood Omen][Blood Omen/6]
Interestingly, the furthest area of the keep contains all regular human enemies (specifically Barkeeps and Wenches) but in exclusively ghost states. This along with the presence of several apparent gravestones in the room may suggest the keep was at one time a mausoleum of sorts before being abandoned to the rising waters of the nearby the Lake of the Dead.[Blood Omen][Blood Omen/6]