I haven't written this up yet.
Should your players arrive here by accident, make things up as you go along, using the following as guidelines:
It's the home of an evil transmuter. Why does everyone shudder when necromancers are mentioned? Transmuters can be even nastier, and this one is.
The Lair is the home of Meera the Transmuter.
[AD&D-Specific] Meera the Transmuter, human female. Str 14 Dex 16 Con 15 Int 17 Wis 15 Cha 14 Align NE Hp 55. Priestess, level 3. Transmuter, level 16.
Further details follow in due course. In the mean time, just imagine what a man-hating lesbian would do if she could cast Polymorph Any Object.
Meera and Lady Pamina are old adventuring companions and still meet from time to time to compare notes. Each would come to the other's aid in times of emergency.
Meera has a contact in the Yellow Circles District of Qwanet, and knows what is going on there.