Once the cities of Bannor had been razed, it was easy for Vecna to begin raising his Necropolises with the aid of his powerful magic and his legions of untiring, undead servants. These cities are the last safe places left in the world, although, “safe,” is a matter of perspective.
The necropolises house the intelligent undead and their mortal servants. In the beginning the living inhabitants were all prisoners captured amid the wholesale slaughter enacted by Vecna’s armies; those who would be useful as slaves or chattel. Now, though, the vast majority of the mortals living under his rule are people who surrendered. Those who didn’t want to eke out a meager existence living in havens underground, scrounging moss and fungi for food, ever afraid of discovery, willingly became servants of the dark god. In exchange they were allowed to keep their families together, practice a trade of their choice, and were given access to his conservatories. All that was required of them in return was their loyal service, and the location of the havens which they left.