Magg was Chief Steward at Dinas Rhydnant. On learning that Fflewddur Fflam was not an official bard, Magg relegated Fflewddur to the stables. Not long after Eilonwy arrived, Magg kidnapped her and took her to Caer Colur, where she was bewitched by Achren. Eilonwy put up enough of a fight during her kidnapping that Magg had to gag her to keep her quiet, an unfortunate move since this meant that when she accidentally dropped her bauble -- an ancient item of enchantment much desired by Achren -- she was unable to tell him.