Use a Super on the top and bottom blocks. Crystal Flash below the lower block to standup and then begin Moondancing. After Samus sinks through the floor tiles, use Grapple to return to a standing position and count an additional 145 moonfalls. Then use Grapple to get out of the floor.

Requires:

{
  "ammo": {
    "type": "Super",
    "count": 3
  }
}
"h_CrystalFlash"
"canExtendedMoondance"

Exit condition:

{
  "leaveWithStoredFallSpeed": {
    "fallSpeedInTiles": 2
  }
}

Dev note: Obstacle A doesnt need to be checked, because there is no reason to have destroyed more than one block, with Morph. FIXME: This should have a pixel precise setup to prevent using another Super.