Adventurers return from the deeps of Xen'drik all the time with packs full of strange antiquities and treasures. But some treasures aren't meant to be rediscovered. After a recent expedition to just such a tomb, some adventurers brought back more than they bargained for.

A few nights after the expedition returned, corpses began appearing in the morning streets, drained of blood. On top of that, rumors abound that a force in Stormreach's criminal underworld backed the expedition. The PCs will have their hands full as they try to unravel the mystery of the mysterious collection while navigating the many competing criminal elements of Stormreach's underbelly. "City of Blood" is an adventure set in the Eberron campaign setting, although it could just as easily be adapted for play in your non-Eberron home game.