Scalable walls, also known as Climbable walls or simply Walls, were an environmental feature first introduced in Legacy of Kain: Soul Reaver and recurring in Soul Reaver 2 and Legacy of Kain: Defiance. Represented by multiple horizontal lines across a surface, scalable walls were initially impassable, however once Raziel defeated Zephon in Soul Reaver he gained the ability to scale them in the Material Realm and from then on he could climb any surface marked with the distinctive pattern. Though Raziel could not initially scale the walls in the Spectral Realm, by the time of Defiance he was able to scale them in both realms.