History
Xanadu was Professor Phobos's base in the radioactive Forbidden Zone, where he worked on the Soviet Super-Soldier program. When his project was cancelled the base was abandoned, but three mutants mutants who were part of the program stayed and made it their home, naming it Xanadu. They were later found by Yi Yang, who became their leader. The former Soviet citadel became her base in Siberia, from which she ran her drug empire in Russia.[1]