Dungeon Master (DM) - the organizer and participant in charge of creating the details and challenges of a given adventure, while maintaining a realistic continuity of events.
It has been 30 years since Tirek was defeated. Now, after having traveled the world to regain his power, he is ready to conquer Equestria once and for all.
Zircom is bored with life. After hearing hundreds of bard's tales, all he wants to do now is find an adventure of his own. Where his adventure will occur is a mystery. Zircom doesn't know, nor does he really care.