I am running a desert-themed campaign right now, with a lot of ancient Egyptian flavor. So I made a few tweaks and cosmetic changes to the D20 vampire.
- A vampire looks like a dessicated, dried human corpse until he has fed. Each point of Con that he drains from another living creature restores his body to a normal (although slightly feral and pale) appearance for one day. In addition to giving the vampire a human appearance, this "restored" body grants the vampire a +2 racial bonus on all Charisma-based skills and ability checks. Vampires in position of political power often have a constant food supply handy, such as a harem.
- Vampires are vulnerable to fire.
- Children of the Night: the vampire summons rat swarms, bat swarms, or a pack of jackals (use stats for dog, and double the number appearing).
- Alternate Form: the vampire can assume the shape of a bat, dire bat, jackal, or dire jackal (use stats in Sandstorm).
- Sand Form: instead of assuming gaseous form at will, the vampire can turn his body into sand instead (as per the "sandform" spell in Sandstorm.)