{
  "tile_processors": [
    {
      "type": "leveled",
      "levels": [
        {
          "level": 0,
          "type": "spawner",
          "target": "ispawner:spawner",
          "output": [
            {
              "elements": {
                "the_vault:butcher_bruiser_guardian": 70,
                "the_vault:butcher_arbalist_guardian": 30
              },
              "weight": 1
            }
          ]
        }
      ]
    }
  ]
}