Reaching into the shadow of the creature, you grasp the shadows of the deleterious things that affect it and tear them away.

You create a wall of frigid shadow that blocks vision and wracks all who pass through it with cold.

You create a wall of shadow that completely blocks line of sight. Any creature passing through the walls takes 1d6 points of cold damage per caster level (maximum 15d6).

The subject's vision overlaps the Plane of Shadow, causing him to see flickering images, areas of darkness, and other visual discrepancies with the material world.

You impede the subject’s vision and its ability to determine what’s happening around it. The subject takes a -4 penalty on attack rolls, saves, ability checks, and skill checks. In addition, you have total concealment with respect to the subject.