Wraiths may form packs with others of their kind in places where death and mayhem are commonplace-countrysides ravaged by war, metropolitan underworlds run by criminal overlords, or sites of fiendish cultic rituals. In these places, the living do well to tread with sunrods and powerful clerics in tow. Ruins, sewers, and abandoned buildings provide sanctuary for wraiths during the day, as the creatures hunt exclusively at night or in dark places. Wraiths are smart enough to take advantage of their incorporeality in combat, so they keep to tortuous caverns or structures with hallways and avoid open areas.