[quote=TaliPaendrag]
That is an amazing series, but if you're talking about the , it won't be like that. I was just thinking of a material that had an anti-magic field of its own that prevented magic when worn by a mage. Guardians aren't a thing in the other land, so there isn't another way to deal with those who can use magic.
[/quote]

The material could undergo a process similar to how guardians are created in the Five Kingdoms, except in a more rudimentary form. Kind of like the basic technology leading to a greater technology.