The user brings up a solid wall of sand that is so dense, it can block weaker moves. (Generally Power 60 and below...but with certain exceptions) The user can even create it from any form of Earth around them (meaning rocks, and other actual sediment. No trees, wood, etc.). Direct attacks are less likely to penetrate than projectiles. Also, concentrated projectiles can pierce the wall more easily than more broad moves. Better used for ranged defense (as in blocking a distance away from the user's own body).