This is an example of Mime magic. This works by creating an invisible ladder for the caster to climb. They actually float a small distance away from the surface climbed. No one else may use the ladder.

Clinging [6] 
    Walls Only [-20%] 
    Magical [-10%] 
    Spell Components [-40%] 
        Must mime climbing a ladder 
        Must wear a beret 
        Must wear white make-up on face 
Level 2 [10] 
    Add Extended Duration (x3) [+20%] 
Levels 3-7 [14/18/22/26/30] 
    Increase Extended Duration by 1 step [+20%]