Utilimancy

Salteration is a school of magic that encompasses the act of taking an unliving organic material and imbuing it with salt to give it special properties. Salteration is arguably the most prevalent form of magic in the world, with every known culture in the world having done it.

Most catalysts for salteration are relatively simple and aren't too complex like coal, wood, or bone. A catalyst is considered simple when it is composed of one or few materials, and the object's volume is consistent. (Phrased poorly) For example, a refined charcoal orb is very simple: it's composed of one single material, and the amount of charcoal through the orb is consistent and even. A bone, however, is more complex: it is partially hollow, may have marrow within it, and can be in an odd shape.

Relative to other schools of magic, salteration takes a moderate amount of skill to do well. It is not uncommon for adventurers and commoners to have enough skill in salteration to salter minor things or use saltered catalysts, but professional salterers can make a living off of saltering and selling their wares.