This was one of the seven most famous natural wonders of Western Desert - the movement of hundreds of thousands of sand dunes. It was like heaven was using a brush to sweep past most of the Western Desert, drawing a curved line. In this fixed curved path of moving sand dunes, there were no oases, no beasts and no rocks, there was only yellow sand. No one could stop it, even rank eight Gu Immortals were powerless.
For these enormous moving sand dunes, Western Desert's people named them impassable dunes, revealing their helplessness and confusion towards nature's might.
"Impassable dunes…" Fang Yuan, however, narrowed his eyes, and flew straight towards the sand dunes.
He had concealed his figure, and flew right above the battlefield on the ground, but no one detected him.
Several of Xiao clan's Gu Immortals were fighting on the impassable dunes, but they were at the periphery, even these Gu Immortals could not explore the inner areas.
