Wings of Fire, the RP: Hope on the Horizon Archives.

The SandWings are known for many things, including their fighting skills, and the Scorpion Den, full of outclaws and filches. They live in, you guessed it, the Sand Kingdom, and have a high heat tolerance (unlike the dragon writing this right now), which means that they can survive a long time without water. One of their features is also a barbed tail, like that of a scorpion, along with a forked black tongue. They can breath fire. SandWing's scales are usually pale yellow or white, although in some rare cases, the scales will be a more sunny color, more like that of sand. This unusual coloring usually occurs when the dragon is not a pure SandWing, but a hybrid of Sand/NightWing. A few weeks before the academy was built, the IceWing animus waged war on the NightWings with the help of the SkyWing and SandWing armies.