{
  "criteria": {
    "criterion_one": {
      "trigger": "minecraft:player_killed_entity",
      "conditions": {
        "player": {
          "equipment": {
            "mainhand": {
              "predicates": {
                "minecraft:custom_data": {
                  "vb.item.soul_chalice": true
                }
              }
            }
          }
        }
      }
    }
  },
	"rewards": {
	  "function": "vb:trigger/soul_chalice"
	}
}