Requires:

{
  "or": [
    "Gravity",
    {
      "and": [
        {
          "not": "f_DefeatedPhantoon"
        },
        "canRiskPermanentLossOfAccess"
      ]
    }
  ]
}

Exit condition:

{
  "leaveWithRunway": {
    "length": 21,
    "openEnd": 0,
    "steepUpTiles": 3
  }
}