Bomb all the blocks before exiting G-mode near the lower bomb blocks. It is possible to fall back onto the door shell with artificial morph, then use Spring Ball to place a Power Bomb high enough.

Entrance condition:

"comeInWithGMode": {
  "mode": "direct",
  "morphed": true
}

Requires:

"h_heatedGMode",
{"or": [
  {"and": [
    "h_artificialMorphPowerBomb",
    "canArtificialMorph",
    "h_artificialMorphSpringBall"
  ]},
  {"and": [
    "h_usePowerBomb",
    {"or": [
      "HiJump",
      "h_crouchJumpDownGrab",
      "canSpringBallJumpMidAir"
    ]}
  ]}
]},
"h_additionalBomb",
{"heatFrames": 0}

Clears obstacles: A, B, C

Dev note: FIXME: If Bombs are available (vs. Power Bombs), it's not necessary to break all the bottom blocks.