text: {
    "display": {
      "icon": {
        "item": "thebetweenlands:sludge_slicer"
      },
      "title": {
        "translate": "advancements.thebetweenlands.fighter.sticky_situation.title"
      },
      "description": {
        "translate": "advancements.thebetweenlands.fighter.sticky_situation.description"
      }
    },
    "parent": "thebetweenlands:fighter/chopping_boy",
    "criteria": {
      "sludge": {
        "trigger": "minecraft:player_killed_entity",
        "conditions": {
          "entity": {
            "type": "thebetweenlands:sludge"
          },
          "killing_blow": {
            "source_entity": {
              "nbt": "{\"SelectedItem\": {\"id\": \"thebetweenlands:sludge_slicer\"}}"
            }
          }
        }
      }
    }
  }