Walkthrough: After stepping off the elevator in Area 6, Space Jump over all the purple lava and make your way to the Save Station on the left. Continue down this path to eventually reach a door. Head inside, use the Energy Recharge Station, and then use your Spider Ball going upward as you destroy weak blocks as you do. Enter the door that will be on your right, and then remove the red orb with your Grapple Beam to gain access to the previous room. Return to said room and head toward the Chozo Seal. From there, go to the at the top.
Follow the path that contains a Teleportation Statue and a Save Station, continuing to head upward as you do. You will come to a door on your left that needs opened with a charged missile. Go through it and then destroy the ceiling with your Screw Attack. Space Jump after the cut scene, destroy more of the ceiling with your Screw Attack as you do to reach the next room. From there, go through the door on the right and continue down the path to the next larger room. Head into the door on your right after you do, and then Bomb the bottom floor of the passageway to reach yet another door. Inside this room to the right is a Zeta Metroid. Defeat it, and then head back to the Chozo Seal. Don't forget to grab the Missile Expansion in the large room to the left.
Drain the purple lava after reaching the Chozo Seal like before. It won't drain far enough to leave Area 6, but it will earn you access to the next section of the area. So go to the left and drop down through the hole you come to. Go into the next room and Bomb directly above the weak spot above the vent. From there, quickly drop down and launch a Missile at the second weak point to open the path. Pull on the red block, and then use your Grapple Beam upward on the area to the right. Now use you Screw Attack to quickly get by the long path and come to a door, heading inside after you do. Inside will be a Missile Expansion and an Energy Tank.
Pass through the room where you found the Zeta Metroid over to the connecting room, the same that contains the first Omega Metroid to come across your journey. Defeat it, and then head back to the Chozo Seal to deposit its DNA. Having trouble defeating the Omega Metroid? Check out our guide on How To Defeat Omega Metroids!
Missile Expansion #1: Go to the left in the large room, heading toward the Aeion Recharge Station. Bomb the weak point in the floor near it and then drop through the hole. Use your Lightning Armor to make it past the flora and to the Expansion.
Missile Expansion #2: Before you reach the Omega Metroid, make it across the breakable floor using your Phase Drift. Bomb the left side after you do to find the Missile Expansion.
Energy Tank: Before you reach the Omega Metroid, drop through the breakable floor and Bomb the left wall to find the Energy Tank.