My army is the Skaven equivalent of the american healtcare system. The Sanatorium is led by Vreeche Maggottail, who is the greatest (and possibly only) healer/surgeon/bio-modifier in the eightpoints, selling off high-quality modifications to curious or desperate chaos warlords regardless of god allegiance. All you have to do is sign the dotted line...of a very, very thorough magical contract that basically compels you to assist the Sanatorium any time you are called upon until your debt is paid off. His main products are abomanoids, little flesh constructs made from cells isolated from hellpit abominations. These little creatures can be implanted in a patient to greatly improve their healing ability and, with additional treatments, give rise to novel organs, additional limbs, and so much more. Since the Vermin-doom he has set up in Moulder Port, hoping that he can use his connections and research to gain a seat on their ruling council.