Requires:

"Gravity"
{
  "or": [
    {
      "canShineCharge": {
        "usedTiles": 20,
        "openEnd": 2
      }
    },
    {
      "and": [
        "canEnemyExtendRunway",
        {
          "canShineCharge": {
            "usedTiles": 21,
            "openEnd": 2
          }
        }
      ]
    }
  ]
}
{
  "shinespark": {
    "frames": 25
  }
}