A Sect siren riding a Nightmare, who decapitates the living and carries their screaming heads to her lair. The Nightmare mount is not quite spirit and not quite flesh, and its touch is as cold as ice. A Banshee is an ally of the Sect and is not a Necromantic construct.
The Nightmare Banshee roams the cold ridges north of the Sect territories, riding a fleshless steed with eyes of night and hooves of flint. Lowland legends speak of howling demons coming out of the hills on cold, rain-swept nights, seeking those who stray too far out from home and hearth for their own safety. After claiming its prize, the Banshee rides back to its hidden mountain caverns, the stolen, still-weeping heads of its victims tied alongside the reins.