Normal human fare

With each other, to make new muir'bran. With other brannishes or other races, it follows the mother.

Any given muir'bran will specialize in a kind of metal, from iron to mercury, from uranium to steel. They will, as they grow up, become accustomed to this metal, being able to sense it, shape it, and use it in anything.

Muir'bran outside of Bran tend to be metalfinders and warriors. In Bran, they live in small villages, each focused on a specific metal, usually near a mine.