Editing Nightmare (section)

===Nightmare parts as components===
In The Ecology of the Cockatrice in Dragon #95 mentions that the blood of a nightmare is one of several potential components required to make a liquid capable of magically preserving cockatrice tail feathers.

The mystic rope spell (Wizard's Spell Compendium Volume III) requires a miniature rope of braided hairs from the mane of a nightmare as its material component. Accord to Ecology of the Scarecrow in Dungeon #183, hairs from a nightmare's mane are also woven into "nightmare thread" by hags. Laced with the filaments of dark dreams, this thread is used to stitch together a scarecrow and keep its spirit bound within the cloth and stuffing. If an adventurer somehow obtains some of this precious commodity, burning the thread turns him or her into a terrifying vision in the eyes of an enemy.

In Dragon #147, hoof of a nightmare is listed as an alternate component for the illusionist's phantom steed spell. This improves the capabilities of the steed by one level. However, with a price tag of 5,000 gp per hoof, and low availability (an alchemist has only a 5% chance of having 1-4 hooves), this seems more like a business opportunity for a nightmare-hunting adventuring group than it does a viable boost for the group's illusionist. Especially since that's not the only use for the hooves. Dragon #317 expands on the optional rules for power components as a replacement for spell XP costs, mentioned in the Dungeon Master's Guide v.3.5. The hooves of a cauchemar nightmare (all four) can be used for a planar ally spell. In order for the hooves to remain useful, they must be stored in a jar filled with a special oil that allows the supernatural flames to continue burning.

In Ringing in the Deep, a tournament adventure for GenCon 2010, the heart of a nightmare can be wielded against a cinderhoof trampler to give a number of special bonuses. The cinderhoof trampler is a minotaur variant (from the Monster Manual 3) who has eaten the heart of a nightmare in order to gain burning hooves. However, using a heart as a weapon against a minotaur seems to be something unique to this adventure.