Tom is visited by the Jacana family, wizards who claim to have found the source of all magic in a giant diamond. However they have been forced into the visit by Varg, who has stolen the genuine diamond and replaced it with a booby-trapped substitute, which blows up, mortally wounding Ursula. Varg captures Benny and Tom, placing the latter in the magic extractor but, just as Tom's magic is drained from him, Chancellor Kooth and her son Jathro declare that they have marshalled the Nekross against the royal family and, after destroying them, will go on to conquer the Earth.
—don @ minifie-1