{
    "name": "minecraft_121_update:trial_chamber",
    "fallback": "minecraft:empty",
    "elements": [
      {	
        "weight": 100,
        "element": {
          "location": "minecraft_121_update:trial_chamber",
          "processors": "minecraft:empty",
          "projection": "rigid",
          "element_type": "minecraft:single_pool_element"
        }
      }
    ]
    }