Placing the bomb against the bomb block at the top of the shaft can be somewhat tricky.

Requires:

{
  "or": [
    "h_canUsePowerBombs",
    {
      "obstaclesCleared": [
        "C"
      ]
    }
  ]
}
"h_canUseMorphBombs"
{
  "or": [
    "h_canFly",
    {
      "and": [
        "canConsecutiveWalljump",
        "canWallJumpInstantMorph"
      ]
    }
  ]
}

Clears obstacles: A, B, C