Climb to the middle section and kill all three Metroids while taking damage. Or use a tricky jump morph into the bottom left corner of room to kill all three Metroids from the bottom section.

Requires:

{
  "enemyKill": {
    "enemies": [
      [
        "Metroid",
        "Metroid",
        "Metroid"
      ]
    ],
    "explicitWeapons": [
      "PowerBomb"
    ]
  }
}
{
  "or": [
    {
      "and": [
        "can4HighMidAirMorph",
        "canTrickyJump",
        {
          "metroidFrames": 330
        }
      ]
    },
    {
      "metroidFrames": 530
    }
  ]
}

Clears obstacles: A