{
  "name": "Harbinger Cube",
  "icon": "minecraft:spawn_egg:0{EntityTag:{id:\"twilightforest:harbinger_cube\"}}",
  "category": "entities",
  "advancement": "twilightforest:alt/entities/harbinger_cube",
  "sortnum": 9010,
  "pages": [
    {
      "type": "entity",
      "entity": "twilightforest:harbinger_cube",
      "text": "things and stuff"
    }
  ]
}