This eerie horse-like creature’s skin is an inky blackness. Fire spurts from its hair and nostrils, and its hooves spray sparks.
Speed 40 ft., fly 90 ft. (good)
1/day (self plus 1 rider only)—plane shift
Str 18, Dex 15, Con 16, Int 13, Wis 13, Cha 12
In battle, a nightmare exhales smoke that chokes and blinds foes, filling a 15-foot cone each round as a free action. Anyone in the cone must succeed on a DC 16 Fortitude save or become sickened until 1d6 minutes after leaving the area. This smoke acts as obscuring mist for the purposes of concealment. The smoke persists for 1 round. The save DC is Constitution-based.
Source: Chris Malidore
Environment any (Abaddon)
Nightmares are flaming harbingers of death. They allow only the most evil of creatures to ride them, and are never mere mounts, but rather willing partners in destruction.