It is made of wood (if any note the type, it will not seem to be of the type which once made up the forest) and parts of the wood near the bottom is rock, along with jagged areas all over. Note room 4 if psionics are employed.
1. Upon opening the first door, the party will be confronted by a second door—with a scroll tacked on it. On the scroll are explosive runes, which when read deliver 6d4+6 points of damage to the reader, and the same or half to others in the 1" blast area. The second door will be blasted open. Guarding this room is a stone Golem, a little weaker because of age, but still quite formidable. (AC5, MV6, HD16+, hp60, at1, D3-24, SA: slow spell every other round, SD: +2 weapon needed to hit, only vulnerable to rock/mud, stone/flesh spells)
2. Set up in this room are some old cots, tables.
a) There are 2 stone statues in here. Also, a Xill (AC0, MV15, HD5 hp29, at4 at +3, D1-4x4, SA:paralysis on grapple, MR:70%, it will attempt to subdue/grapple, then leave to its own plane) which is very desperate for egg bearers, but it will not attack if the odds are not that well. In its lair on the Ethereal Plane (a glowing nest of energy) there is a person with 7 Xill eggs inside him (this was one of the merchants—the Xill had been ranging far and wide to find a host) which are 2 days old.
b) There are 3 statues here.
3. Three statues are seated in here. Also an illusion of a hideous demon (lifelike but still) in front of the north door.
4. Two Cerebral Parasites are, for the most part, In here, although they travel the Ethereal and Astral planes too. There is a massive stone chest in the center of the room, with a stone Cyclops in front. A combined strength of 32 is needed to open. Inside: 3,000cp, 50sp, 15 silver goblets (1gp). The window here has evidently been smashed.
5. This room is lit up a bit. In the closet are some old, now ragged clothes. In the chair by the desk is the stoned M-U. Above his head is where he cast a continual light spell. The desk has 2 drawers on each side. On the desk is some parchment (which the M-U was writing on) which is little more than rags now. In the top right drawer is: 50pp, 50gp. In the lower right is 50sp, 50cp. In the top left are some writings which have lasted. These shall only last 3-18 turns outside of the house. The bottom left is empty. The right ones have poison needles, save at +5 due to age.
