Well its not the black smith in the village I am referring to, its the smith enchanter. Hahahaha I think I make you guys confuse. He can be located at the top western part of broken valley map. And that guy is actually a smith himself. And bout your necromantic parts, even naberius wont release the creature to you, but you still can bring him parts to add into the creature construction list, therefore those parts will be gone from your inventory. If there are any repeated parts, it will be remain in your inventory and you can go sell it off. You can also sell off lousier ones and keep those strongest for construction.
And 1 advice, finish explore broken valley before entering maxos temple. You had more benefits doing it like this. Its not necessary to complete all side quests but fully explore the area will help you know the place better, as well on your level by clearing mobs in the wild.
