Planar portals, also known as Material-Plane portals, Conduits into the Material Realm or simply Portals, were used throughout Legacy of Kain: Soul Reaver and Soul Reaver 2 by Raziel, they allowed him to "gather matter" unto himself and effectively cross from the Spectral Realm to the Material Realm, though Raziel was only able to utilize the portals if he is at full strength. Many puzzles in the Soul Reaver series relied on the Plane Shift mechanics of the planar portals.