D&Dtools1

Benefit

You can take part of one of your move actions ant a wall if you begin and end your move on a horizontal surface. The height you can achieve on the wall is limited only by this movement restriction. If you do not end your move on a horizontal surface, you fall prone, taking damage as appropriate for your height above the floor. Treat the wall as a normal floor for the purposes of measuring your movement. Passing the boundary between horizontal and vertical is equivalent to 5 feet of movement along a normal floor. Opponents on the floor still get attacks of opportunity as you move up the wall within areas they threaten. For instance, Ma'varkith the psychic warrior has a speed of 40 feet (due to her Speed of Thought feat). She begins her action standing next to the wall. She runs up the wall at a 45- degree angle ("diagonally") for 15 feet, which also puts her 15 feet farther along the hall. At this point, Ma'varkith runs 15 feet straight down the wall, ending her move on a 5 footsquare immediately next to the wall, and takes her attack normally against an opponent there, which potentially sets up flanking for her comrades. If the wall had a ledge within 30 feet, Ma'varkith could have ended her move on it instead of heading back down the wall.

Special

You can take other move actions in conjunction, with moving on a wall. For instance, the Spring Attack feat allows you to make your attack from the wall against a foe; standing on the floor who is within the area you threaten; however, if you are somehow prevented from completing your move, you fall. Likewise, you could tumble along the wall to avoid attacks of opportunity.