Uncommon in Middle-earth, Specters are cold, white, incorporeal figures akin to Ghosts. Victims killed by Specters frequently become Specters themselves. The Balrog of Moria, for instance, had his minions throw captives into caverns and pits known to be haunted by these creatures.
The Specters' need for energy is so great that even the lesser kind drain 8 points of constitution per round. They cannot be affected by nonmagical weapons because of their insubstantial nature. The Specters of Moria can cast Shock Bolts, in addition to their energydraining abilities.