Kill all of the enemies with Bombs. Samus will take a Baby Kraid spike hit while rolling through the invisible projectiles. It is not too difficult to IBJ and then bomb horizontally over the cluster of invisible spikes, but there is some risk because they are invisible. They occupy a slightly smaller space than what Baby Kraid was occupying.

Entrance condition:

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

Requires:

"h_canArtificialMorphBombs"
{
  "or": [
    {
      "and": [
        "h_canArtificialMorphIBJ",
        "h_canArtificialMorphBombHorizontally",
        "canTrickyJump"
      ]
    },
    {
      "enemyDamage": {
        "enemy": "Mini-Kraid",
        "type": "spike",
        "hits": 1
      }
    }
  ]
}

Clears obstacles: A