"Enchanting, which is actually native to this world, is one of our more versatile forms of shareable magic. It can substitute for our default utility magic in a pinch - and I use it preferentially because I had it first, and so does one other Bell. Using the upper levels of its power, however, requires unusual personnel assistance, intense powers of concentration, a magical upgrade, or unethical behavior. And you have to do a lot of enchanting to get an aura. We have a shortcut for auras, which incidentally doesn't require very much skill either, but then you'd still have the ability to enchant in non-aura ways. And torching means you could survive a lot of untutored trial and error."