Unholy Steed (Diabolic Steed, Demonic Steed)
This spell will summon 1 Nightmare to serve the caster for one night.
The Netbook of Witches and Warlocks
By Timothy S. Brannan and The Netbook of Witches and Warlocks Team
Conjuration Summoning (Evil)
The caster must be outside at night to begin the summoning.
The spell components for this spell are a pinch of sulfur and an old horse shoe.