Jump into the room with blue speed, morphing and unmorphing to clear Samus' horizontal momentum while retaining blue. Use the blue to break the right-most bomb blocks above, then fall down.

A momentum-conserving morph through the transition is not always required but usually makes the strat easier. In many cases, pause buffering the morph can also be helpful.

Entrance condition:

{
  "comeInWithSidePlatform": {
    "platforms": [
      {
        "minHeight": 1,
        "maxHeight": 1,
        "minTiles": 16,
        "speedBooster": true,
        "obstructions": [
          [
            1,
            0
          ]
        ],
        "requires": [
          "HiJump",
          {
            "getBlueSpeed": {
              "usedTiles": 14,
              "openEnd": 1
            }
          },
          "canInsaneJump",
          {
            "heatFrames": 155
          }
        ],
        "note": [
          "This applies to Lava Dive Room."
        ],
        "detailNote": [
          "To get enough height, it is suggested to do a double-stutter 3-tap with an early third tap."
        ]
      },
      {
        "minHeight": 3,
        "maxHeight": 3,
        "minTiles": 21.4375,
        "speedBooster": true,
        "obstructions": [
          [
            3,
            0
          ]
        ],
        "environment": "water",
        "requires": [
          "HiJump",
          "canInsaneJump",
          "canGravityJump",
          {
            "heatFrames": 155
          }
        ],
        "note": [
          "This applies to Draygon's Room."
        ]
      }
    ]
  }
}

Requires:

"canMomentumConservingMorph"

Clears obstacles: A