Mus

Mus was the only moon of Mercury, a tiny gray rock rendered invisible to Earth-based observers by powerful magic. It served as the home of the Hermetic Fors Collegis Mercuris, and hosted a large number of Batini refugees after the City of Brass Chantry on Mercury's surface was destroyed.

In 1995 the moon was conquered by the Nephandi, and in 1996 it appeared to crash into Mercury's surface. In one of the Time of Judgement scenarios for Mage, however, the Unnamed has occupied Mus and uses it as his base of operations.