Crafted set items are a huge incentive to work on your smith professions and research more traits for armor and weapons in Elder Scrolls Online. Item sets give bonuses based on how many items of the set you’re wearing. Generally speaking, there’s 3-piece bonuses and sometimes 5-piece bonuses for crafted item sets in ESO.
Anyone could craft set items in ESO, but there are a couple of requirements. First of all, all crafted item sets have a Trait Requirement. What the Trait Requirement means, is you can only craft an item of the set if you have learned the required number of Traits for that item. You can learn Traits for Blacksmithing, Clothing and Woodworking by researching, which is a very time-consuming process. That’s why Trait Requirement is the biggest obstacle on your path.
The second requirement is that you have to be able to travel to the special crafting station. Even if you are very low level, you could in in theory at least travel to most of these locations, so your level on its own is not an obstacle. There are a couple of sets which require you to be at a certain stage of a quest line. Spectre’s Eye set is crafted in Coldharbour, so unless you have progressed far enough in the main quest line, you will not be able to craft that set. Same thing with Eyes of Mara, Shalidor’s Curse and Kagrenac’s Hope sets – these sets require you to have finished Mages Guild and Fighters Guild quest lines.
There are no other requirements. You craft a set piece like you would craft any other item – there are no special materials needed.