Citadel of the Wandering Stars

From the introduction: It was said once, long ago, a mad wizard trapped a constellation within a great citadel. The stars, desperate to make their way back to the heavens, wandered the halls trying to get free. Those who catch a glimpse of those stars are burned to a crisp from its rage - but those who avoid them may discover many other wonders the wizard had stolen and stockpiled over the years.