Requires:

{
  "or": [
    {
      "enemyKill": {
        "enemies": [
          [
            "Boyon",
            "Boyon",
            "Boyon",
            "Boyon"
          ]
        ],
        "excludedWeapons": [
          "Bombs",
          "PseudoScrew"
        ]
      }
    },
    {
      "and": [
        "canBePatient",
        "h_canUseMorphBombs"
      ]
    },
    {
      "and": [
        {
          "enemyDamage": {
            "enemy": "Boyon",
            "type": "contact",
            "hits": 16
          }
        },
        "canPseudoScrew"
      ]
    }
  ]
}

Clears obstacles: A