I'm glad to hear of another desert dwelling lizardmen off shoot. I have mine allied towards a sort of "Sand Elf" as well, related heavily to wood elves.
In my set of lore, I have these Sand Elves as a nomad band with no buildings of any kind. They wander through a sea of dunes from water spring to water spring, sometimes using magic to entice the water out of the ground. They wander with their walking tree friends who settle into the ground whenever they make a stop at a spring, leaving them vulnerable, and the elves spread out to hide amongst the sand with the help of their illusions. The grandest of their illusions are the mirages that mislead enemies into walking in circles until they die out of exhaustion; they can even hide the true placement of the sun in the sky so that experienced travelers never find their way out. While they take a mostly hands off approach to defense, they are known to be ruthless attackers, peppering targets with more arrows than it really required to take it down. Trade is scarce as they are a defensive peoples with a hermit kingdom attitude, but they have been known to push sand on would-be traders; much like the real world Inuit having multiple words for snow, so too do the sand elves have many words for sand and all the different qualities. While the sands are great for glass blowers, the market is small and they end up killing most of their captives at the "negotiating table" so to speak.
I don't want to muscle in on your Fluff page, but this is what I had; feel free to pick and choose any aspects that you would like to fit into your sand elves =)
