There is no inherent problem with this, although the flavor text often doesn't fit with the Dark Sun setting. My goal is to list the various monsters that "don't fit" and rewrite their flavor text to make them fit.
I often add a new Athasian variant as well.
These are the only centaurs present on Athas, so there would be no need to differentiate them from other centaurs. I added Athasian, so there's no confusion with dungeon masters and players, but on Athas, they would simply be called centaurs.
Also, they would not be descibed as "half-horse," because horses don't exist on Athas. They would be "half-sygra."
Jesse Heinig created rules to play a desert centaur in your dark sun 2nd edition AD&D game. Here ya go.
| Centaur | Centaur, Priestess | |
|---|---|---|
| Climate/Terrain | Hinterlands | Hinterlands |
| Frequency | Very Rare | Very Rare |
| Organization | Tribal | Tribal |
| Activity Cycle | Night | Night |
| Diet | Omnivore | Omnivore |
| Intelligence | Low to Average (5-10) | Very to High (11-14) |
| Treasure | Q, U | 1d4 gems |
| Alignment | Neutral or Chaotic Good | Neutral |
| No. Appearing | 1-8 (70%) or 4-32 (30%) | 1 |
| Armor Class | 6 | 6 |
| Movement | 21 | 21 |
| Hit Dice | 3, Leader 4 | 3 |
| Thac0 | 17, Leader 16 | 20 |
| No. of Attacks | 3 | 3 |
| Damage/ Attack | 1-4, 1-4, and weapon | 1-4, 1-4, and weapon |
| Special Attack | Missile weapons | Spells/ Missile Weapons |
| Special Defense | Nil | Nil |
| Magic Resistance | Nil | Nil |
| Size | M (6' tall) | M (6' tall) |
| Morale | Elite (13-14) | Elite (13-14) |
| XP Value | 120, Leader 175 | 175 |
Athasian centaurs are the ultimate fusion of mount and
nomadic tribesman tough, slim, fast and stealthy nighttime raiders who
slip into enemies camps and then depart like shadows before the dawn.
They are as reclusive, but very defensive of the lands they claim as their own.
They have barrel-like chests
and long, thin legs. The males generally grow long
beards which they elaborately curl and oil into perfect form. The
females wear veils, but take few other cares about their appearance.
When traveling they carry their goods in packs or drag them along in
litters.





