VOID PONY
Medium Magical Animal (fey)
Hit Dice: 2d10+4 (24 hp)
Initiative: +1
Speed: 40 ft. (8 squares)
Armor Class: 13 (+1 Dex, +2 natural), touch 11, flat-footed 12
Base Attack/Grapple: +1/+3
Attack: Hoof +3 melee (1d3+2)
Full Attack: 2 hooves +3 melee (1d3+2)
Space/Reach: 5 ft./5 ft.
Special Attacks: —
Special Qualities: Low-light vision, scent, ethereal jaunt, DR5/ cold Iron
Saves: Fort +5, Ref +4, Will +0
Abilities: Str 15, Dex 13, Con 14, Int 2, Wis 11, Cha 4
Skills: Listen +5, Spot +5
Feats: Endurance
Environment: Temperate plains
Organization: Domesticated
Challenge Rating: ?
Advancement: —
Level Adjustment: —

Void ponies are bred for strength and aggression, and are similar to light warhorses.
Combat
A void pony can fight while carrying a rider, but the rider cannot also attack unless he or she succeeds on a Ride check.
Carrying Capacity: A light load for a void pony is up to 100 pounds; a medium load, 101–200 pounds; and a heavy load, 201–300 pounds. A void pony can drag 1,500 pounds.
Ethereal Jaunt (Su): A void pony can shift from the Ethereal Plane to the Material Plane as part of any move action, and shift back again as a free action. It can cross over even with a heavy load or a willing rider. The ability is otherwise identical with the ethereal jaunt spell (caster level 15th).

Hahahaha...if this is based on my "void that pony" comment the other day I was referring to a phrase commonly used in "The Matter of Britian", or Arthurian Legend as some have it known. Still, what a nice way to find inspiration in people's sillyness! Good job on this, I like it. This makes a perfect destrier (or Courser in this case) for my elven fey Paladin. :P

AAAAAGH

But thank you so much for not putting something like a "Void Attack". yuck.