Unholy Steed (Diabolic Steed, Demonic Steed)

This spell will summon 1 Nightmare to serve the caster for one night.
Liber Mysterium
The Netbook of Witches and Warlocks
By Timothy S. Brannan and The Netbook of Witches and Warlocks Team
Conjuration Summoning (Evil)
Level: Witch 6
Components: V S M
Casting Time: 10 Minutes
Range: Special
Target, Effect, Area: Special Duration: 1 night.
Saving Throw: None
Spell Resistance: Yes
The caster must be outside at night to begin the summoning.
The Nightmare will serve the caster as her mount till sunrise. At sunrise the Nightmare will return to the Nether Planes.
The spell components for this spell are a pinch of sulfur and an old horse shoe.