Transia is a European country located between Transylvania, Romania and Serbia. More than 90% of its people live in one large town, East Transia, and a number of smaller villages located at the base of Mount Wundagore. Transia (and/or Mt. Wundagore) is the birthplace of Quicksilver and the Scarlet Witch, and of Jessica Drew. It is the base of operations for the High Evolutionary, and the source of the "radioactive clay" used by the Puppet Master.
