Unicopia/src/main/resources/assets/unicopia/recipes/anvil.json

{
  "type": "minecraft:crafting_shaped",
  "pattern": [
    "###",
    " # ",
    "###"
  ],
  "key": {
    "#": [
      { "item": "unicopia:cloud_block" }
    ]
  },
  "result": { "item": "unicopia:anvil", "data": 0, "count": 1 }
}