Wall of Dust

You construct a wall of blowing dirt and grit at a point you can see within range. The wall can be up to 30 feet long, 10 feet high, and 10 feet thick. The wall blocks line of sight. When a creature enters the wall or starts its turn there, it must make a Strength saving throw. On a failure, moving within the wall requires 6 feet of movement for each foot traveled. On a success, movement within the wall only consumes 3 feet of movement for each foot. Regardless of the save, a creature is blinded and deafened while within the wall. The wall disappears when the spell ends.