An Eberron/Ravenloft Crossover
From the introduction:
Dread Metrol is a city enduring an endless siege. The undead legions of Karrnath have maintained their assault for years, and every night, new forces emerge from the Mists. Within the city, Queen Dannel ir’Wynarn tightens her grip, determined to find a way to turn the tide of battle. As resources dwindle, the war machine is consuming the people of Metrol. The bodies of the dead are fused to constructs to create tireless soldiers, while citizens who don’t contribute to the war effort are sent to the Vadalis Kennels and subjected to horrific experiments. As terrifying as the undead forces are, the queen’s relentless pursuit of victory is the source of the greatest horrors.