Started researching Viashino. 35 of those guys in M:tG (including 2 legendary Viashino, both dragon-shamans). Lots of good data to work with there. They seem to be extraordinarly well addapted to desert life (including the potential ability to swim in sand). I'm expecting their sub-race feat (tentatively Red-Scale Clutch) to include Iconic Specialties and probably pretty substantial heat resistance. Social groups are called thrashes, and individual thrashes can display fairly unique characteristics, so I'm looking at Red-Scale Crest having some choices of benefit to represent various thrashes. Might also do a legendary class, as they have lots of good flavor text about observing the wisdom and guidance of 'the Bey'.