Town of Tempest
Mastery is the king of the known Tiefling world, ruling from the largest city, the City of Gold.
It is believed that Mastery is a direct descendent of the Original Pact-Maker through whom he has direct communication with Asmodeus. The general population will never come in direct contact with Mastery though they believe that through worship Mastery may appear through vision to give the final order.
Mastery cares little for the daily lives of his people, focusing his attention on rebuilding the lost glory of his people.