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Nordic Carved Armor requires a Smithing level of 50 and the Advanced Armors perk to create. Pieces can be upgraded with a quicksilver ingot at a workbench and also benefit from the Advanced Armors perk, which doubles the improvement.
The armor is displayed in the Daedric section of the crafting list, because the armor benefits from the Daedric Smithing perk, which doubles the improvement. All pieces can be upgraded with an Iron Ingot at a workbench.