Below is a starting write up of a location which will feature in an adventure modual that I am working on to eventually post to planewalker. I am sharing this to get feedback and see if anyone has ideas they would like to share. So enjoy and comments welcome.
In amongst the other ruins of the slags is a large mansion that has been renovated and turned into the home and workshop of an elderly mage, and former member of the Fraternity of Order, Rossom Ironheart. The mage specialized and excelled in the study and creation of golems, constructs and all sorts of mechanical and alchemical devices, but never rose much inside the Fraternity's ranks due to his tenancy to follow his emotions doing what he thought was good rather than the law. After a long career he retired from the fraternity having given fifty-seven years of active service.
Still in the first few years after that upset he never let his membership dues laps and he attended many meetings. As time went on his friends in the order noticed that he seemed to be more and more troubled about something and that he attended fewer and fewer meetings, even those discussions on his favorite areas of study. About a month after the last meeting he attended in person, he began to send small constructed flying drones to watch and record meetings for him as well as to do simple errands.
This relieved many in the order who cared about him as a friend and colleague as the drones were well made and were soon regularly coming and going fulfilling the old mage's duties as a member of the Fraternity. Through the small constructs Ironheart's career took on a second life as he participated in the order and shared much of his research. Several of his designs were so well met that replicas of them as well as constructs partially based off of them are still found in use today by several members of the Fraternity.
On many occasions braver members of the Fraternity would make the trip into the slags to visit with the old man. However as time went on even these personal visitors were greeted by his constructs. While visitors were never turned away, nor were any of his official responsibilities ever allowed to lapse, the man himself was seen and heard from less and less, automation taking his place.
A few years before the faction war, worried for his health and unable to get a reasonable answer from his messenger constructs a group of fraternity members ventured to the mansion and insisted on meeting with the man in person. Rossum's construct staff took quite a bit of reasoning to work with but eventually logic prevailed and the group was shown to the mage's private study and quarters. They found him dead in his bed and were finally able to ascertain that he had died peacefully about a month earlier and that the machines were simply running on their prior programing believing the mage to be asleep. The body was then properly collected and given all due recognition for the old man's years of work and many contributions to the order.
In his will Rossum left his estate to the Fraternity of Order, Sigil chapter, and the order went about reprogramming many of his constructs, taking some for study and use elsewhere, and leaving others to take care of the mansion and its grounds. The functioning of the mansion had been entirely automated and many of Rossum's experiments and long term projects were still being run perfectly well by his constructs even after his death. At first the Fraternity kept a small contingent of members at the mansion to further study the constructs and make use of the mansion's facilities. However following the events of the faction war the order stopped keeping a constant presence at the mansion.
Recently, in the past months, a disturbing development has arisen. Children have gone missing from the areas around the slags and several were later found in and around the mansion. While missing children from the hive normally isn't considered very surprising the trend for them to be found in and near the mansion has caused some concern. Also it seems that children from other parts of the city have started to be drawn to the mansion. Several children have been found sleepwalking to the mansion and several have come not knowing exactly why. The automations inside the mansion generally will take care of and protect any children they meet. Some have even reportedly been found giving small groups children lessons on music, crafts, mathematics, reading and even magical and arcane lore studies. Still not all missing children are found and rumors abound about darking things happening to some of the children that find their way to the mansion.
Good stuff. So, the question is: What is happening to those lost children?
Perhaps nothing .. perhaps they are vanishing for a completely different reason and the house makes a good scapegoat.
Perhaps the machines have decided to try and rebuild their maker in the only way they know how, as one would build a machine.
Perhaps the machines, in an attempt to improve their design have begun killing children and reanimating them with internal mechanical parts. Many of the children which "return" from the house are actually the first wave of these advanced models, observing city life as children, which are easily overlooked. The children which don't come back are either failed expiraments or used as replacement parts when one of the "skin suits" is damaged.
You probably have your own answers, but I thought I'd throw out a few ideas even so.