The skin unlocked by this item is required to complete the following achievements:
{"item_id": "18587", "name": "Collar de la Corte de la Pesadilla", "type": "Armor", "level": "80", "rarity": "Exotic", "vendor_value": "291", "icon_file_id": "493124", "icon_file_signature": "FFC3C975B33A99092B97ED6321F273B7F2A64A69", "default_skin": "692", "upgrade_recipes": [], "game_types": ["Activity", "Wvw", "Dungeon", "Pve"], "flags": ["HideSuffix", "AccountBound", "NoSell", "SoulBindOnUse"], "restrictions": [], "details": {"type": "Shoulders", "weight_class": "Medium", "defense": "97", "infusion_slots": [], "infix_upgrade": {"id": 159, "attributes": [{"attribute": "Power", "modifier": 32}, {"attribute": "Precision", "modifier": 45}, {"attribute": "ConditionDamage", "modifier": 32}]}, "suffix_item_id": "24848", "secondary_suffix_item_id": ""}}