C1299 Earth Realm

As for Yu Yin, his speed became faster and faster in the yellow sand. In the blink of an eye, he had turned into a beast and disappeared from the trio's sight.

A moment later, under Wulu's guidance, Yu Yin stopped beside a huge stone slab.

The stone slab was seven or eight meters long and wide. It was an irregular rectangular slab covered in a thick layer of yellow sand. Yu Yin sized it up