Dust in the Wind

From publisher blurb: In Dust in the Wind, a group of level-10 adventurers learns about a recent series of murders in the Crimson Sea desert. There, an oasis called Greenrock Village is on the brink of collapse. It depends on the many travelers and visitors from the many nearby communities. But the news of the people killed in the desert has scared everyone off... The locals call it the Sand Rider of Death. A huge formation of sand that thrusts its victims with a spear and turns them into fine grains of sand. No one knows who is behind these crimes. The locals ignore the existence of the Ashen Witch, a desert hag. The evil fiend has the sole and only purpose of creating clay servitors with the people she has murdered. She desires an army to take over the whole Crimson Sea...