Permeable Barriers - also known by specific terms such as Gates, Barriers, Bars, Fences, Cracks, Grates and a number of other related terms - were permeable environmental barriers that could passed through using the Mist Form and Phasing through gates abilities in the Material and Spectral Realms respectively. These barriers were encountered in Blood Omen: Legacy of Kain, Legacy of Kain: Soul Reaver, Soul Reaver 2 and Legacy of Kain: Defiance and could be navigated by both Raziel and Kain in different realms.