Phendrana's Edge is a room in the Phendrana Drifts. The room is composed mostly of large ice structures and rock formations. There are also a few root systems in the room of unknown origin. The room connects the Upper Edge Tunnel, the Lower Edge Tunnel, the Storage Cave, and the Security Cave. The bottom of the room is submerged with water. This underwater area has a Purple Door to the Lower Edge Tunnel, along with two Jelzaps. A small walkway leads up to a small platform with another Purple Door leading to the Upper Edge Tunnel. From this platform, Samus can reach a small root bridge leading to more higher platforms. Two Flying Pirates can be found on this root bridge. One of these platforms has a seemingly insignificant rock wall that can be destroyed with a Power Bomb. The X-Ray Visor can be used to detect this wall. The destruction of this wall reveals a Red Door to the Storage Cave. In order to get to even higher platforms, The Grapple Beam can be used on Grapple Points and a Glider to reach a small Morph Ball tunnel at the top, leading to the Security Cave.