"N" is for "Negahorse"

Negahorse

No. Enc.:  2d6 (3d6)
Alignment:  Neutral
Movement:  210' (70')
Armor Class:  5
Hit Dice:  10
Attacks:  1 (bite, kick, trample)
Damage:  1d8 or 1d12 or 3d6
Save:  L5
Morale:  9
Hoard Class:  None
XP:  2,400

Negahorses are stocky, ill-tempered equines found in blasted plains and desolate wastelands.  Predators give them a wide berth.

Negahorses discharge antimatter energy from their eyes, heads, and snouts—their craniums to glow and crackle with an indigo nimbus before release.  The beams act as a combination of the Energy Ray and Disintegration mutations:  usable once every 3 rounds up to a distance of 50', and destroying WILx10 lbs of matter (dead and living alike), and utterly lacking the "reduced to 1 HP" side effects.  Negahorses have WIL scores of 12+1d8.

Only the bravest / most foolhardy individuals attempt to take negahorses as mounts.

Mutations:  Reflective Epidermis (Radiation), Unique Mutation ("Antimatter Blast")