The Mission to Urû'baen was a Varden operation prior to the Rider War. The mission was to capture the eggs of the yet-unhatched Saphira, Thorn and "Fírnen", all of which were in Galbatorix's possession. Brom, however, secretly hoped to take revenge on his former role model, Morzan, who had betrayed the Dragon Riders to Galbatorix.