Know thee the shriek of the Banshee, the shrill call which ushers all to their fall, beware the cry -- to hear it is to die.
The banshee is a dangerous form of undead driven by insanity and grief. It is thought only women can become a banshee, perhaps because of Death's favor to them as beings capable of bringing new life into the world.
Exactly what causes a banshee is unknown, but highly-sought information by necromancers.
The banshee's cry is deadly to all who hear it and more powerful banshees can even warp the very land with their shrieks.