Uhayad, Lady of Deserts and Sands.
According to the legend, millennia ago, in the cold wasteland in the southern part of Tad, a small limbless reptile of an unknown species was born. Due to its inability to walk, it couldn't leave the nest like its siblings. Months passed until they all matured and had to leave the nest to migrate north due to the sudden rise in temperatures in the region.
The little reptile couldn't follow the rest of its species and remained in the nest. After several days, this small being struggled and fought to crawl to the nest's entrance but was exhausted and lacking strength. Even though it fought with all its might, it couldn't make much progress.
Several days passed without eating or drinking water, and everything began to melt. Despite being on the brink of death, the reptile fought on, driven by pure instinct. It eventually encountered a massive shadow.
This shadow, upon seeing the little reptile's efforts, abandoned miles away from its family, decided to raise its hand and blow gently onto its palm, causing sand to fly and bury the creature.
Three days passed, and the reptile emerged from the sand dune, completely transformed. It had changed, and sand continuously emanated from its body, warming the cold ground. It was now able to move by sliding through the sand. Years went by, and the reptile grew exponentially, eventually measuring over 50 meters in length. It continued to emit sand from its body, and that small sand dune became the vast desert we know today.
It's said that scales from this immense being can be found in the sand and are highly coveted by the wealthiest. The cries of this creature are said to be heard throughout the desert at night, cries of sorrow for never having been able to reunite with its family.
This is the legend of the origin of the Shameyim Desert. Whether you choose to believe it or not is up to you.