Your aptitude is sand magic. In the ceremony to determine magical aptitude that everyone receives at age 12, he, the fifth prince of the empire, was judged to be a sand attribute. Three years later, he was declared incompetent, able only to manipulate sand, and banished from the empire to the desert, told to live with sand for the rest of his life if he loved it so much. Thinking he couldn't survive in such a place where everything was sand, he prepared for death, but there he discovered the advantages of sand magic and even built a giant sand castle. Realizing that the hellish land was actually heaven for him, he decided to spend his time leisurely in this desert. However, as he used sand magic to find desert resources and create oases, various races began to visit, and before he knew it, a huge nation had grown. His homeland, the empire, which had set its sights on this, aggressively attacked, demanding everything. But his sand magic was invincible in the desert, and the persistent empire was defeated by his sand magic, causing the empire to gradually decline. In contrast, the sand kingdom became highly regarded by those around it.