Drevos, the Great White Elk
Size/Type: Large Animal
Hit Dice: 4d8+24 (42 hp)
Speed: 50 ft. (10 squares)
Armor Class: 15 (-1 size, +1 Dex, +5 natural), touch 10, flat-footed 14
Base Attack/Grapple: +4/+11
Attack: Gore +7 melee (2d6 +4)
Full Attack: Gore +7 melee (2d6 +4) and bite +1 melee (1d4+2)
Space/Reach: 10 ft./5 ft.
Special Qualities: Low-light vision, scent, proud*
Saves: Fort +10, Ref +5, Will +2
Abilities: Str 18, Dex 13, Con 22, Int 2, Wis 13, Cha 8
Skills: Listen +5, Spot +4
Feats: Endurance, Run
Challenge Rating: 3
If anyone other than the King of the Vallheim attempt to ride Drevos, his attitude shifts down one step. In addition, the rider takes a -10 to all Ride checks while on Drevos, and must succeed at an opposing strength check against Drevos every round or be bucked off.
Felt like statting him out. He is based off of the heavy warhorse, with some minor advancement and a special. I had to resist making him really tough, though I did toy with the idea of making him a dire white elk...
EDIT: This was assuming 3.5, I'm not all that familiar with 4th, I'm not really a fan of it.