Legend has it that an unsanctioned Archon reigns from the island upon which lies the City of Silence.
What is known is that speaking is forbidden upon this island, and that it is a place which is avoided by all sane folk. Merchants passing between the eastern Dominion and the western half avoid the isle when possible, sailing directly past it. Even during a storm, captains prefer to brave the waves rather than land on the Mistress' isle.
Some consider her an Archon, though she has no fixed place in the Dominion's hierarchy.