Vault (Sanctuary Fortress)

The Vault is a large, open room in Sanctuary Temple, in Metroid Prime 2: Echoes. The room has no ceiling or floor, with a long drop if Samus happens to fall. In this room is the Screw Attack, covered by a shield that is invulnerable to Samus's Weapons. To obtain it, Samus must release the lock on the shield by jumping to the four platforms that are placed around each of the shield's corners, activating the lenses on each, all while being careful to avoid falling down. After all four lenses are activated, Samus has to activate a morph ball bomb slot, which turns on the lenses and focuses energy into the lock, giving the lock power and Samus access to the upgrade.