MinecraftLegends/Win32.DX11.Release/data/definitions/entity/guardian.json

{
  "definition.guardian": {
    "textures": {
      "default": "textures/entity/guardian",
      "elder": "textures/entity/guardian_elder",
      "beam": "textures/entity/guardian_beam"
    },
    "geometry": {
      "default": "geometry.guardian"
    }
  }
}