The heroes journey deeper into the Vast to the Gate of Twelve Suns, an alien megastructure incorporating no fewer than a dozen stars. They must explore the vast construction to learn how to open a portal to the demiplane that contains the alien superweapon they have been seeking, but the heroes must contend with the Cult of the Devourer for control of the alien technology. Only by finally defeating the cult can the heroes keep the superweapon out of the wrong hands-though the cult is far from the only threat facing the heroes.