Jump into the first ceiling Samus Eater in Hellway. After teleporting and passing through the transition, X-Ray climb to reach the space above, to the right of the blue gate. Samus will be off-camera, but the slopes at the top will push the camera up, indicating when the climb is done. Off-camera the gate can be opened with Wave beam but not with a gate glitch.

Entrance condition:

{
  "comeInWithSamusEaterTeleport": {
    "floorPositions": [],
    "ceilingPositions": [
      [
        6,
        3
      ]
    ]
  }
}

Requires:

"h_heatProof"
"canXRayClimb"
"Wave"