e4k-data/data/islandPreBuiltCastles.json

All recent data from Empire: Four Kingdoms

[
  {
    "preBuiltCastleID": 16,
    "startPlayerLevel": 35,
    "startResourceID": 7
  },
  {
    "preBuiltCastleID": 17,
    "startPlayerLevel": 35,
    "startResourceID": 8
  },
  {
    "preBuiltCastleID": 18,
    "startPlayerLevel": 35,
    "startResourceID": 9,
    "costC2": 59000
  }
]