The Key of D-Isl (also known as Sky Temple Key 7) is the seventh Sky Temple Key required for access to the Sky Temple in Metroid Prime 2: Echoes. In the Ing Reliquary in the Sky Temple Grounds, Samus must locate the Flying Ing Cache in another spectrum, then destroy it to obtain the Key. The Light Suit is necessary as there is Ingstorm present in the Reliquary.