Key of G-Sch

The Key of G-Sch (also known as Sky Temple Key 4) is the fourth Sky Temple Key required for access to the Sky Temple in Metroid Prime 2: Echoes. In the Dungeon in Dark Torvus Bog, Samus must jump into the Dark Water. Underwater, she will come across a Watchdrone blocking a small opening. To get it to move, Samus must activate a Light Beacon above its head, and quickly roll through the opening with her Morph Ball. She must repeat this a second time before she can find the Flying Ing Cache and destroy it. The Light Suit is necessary as it provides immunity to the water.