The Mason Mob was a hit squad posse formed by Trancesk8er in Dragonhollow's Fourth Era in order to contain, counteract, and crush Mason. They carried out several operations against the unwanted denizen but had little lasting effect in discouraging his behavior, though his interference in Trance Swamp was halted by repeated assassinations. Eventually, Eris obliterated Mason and the mob disbanded, their goals having been met.