So, I've just started playing a Porté sorceror in an online game, and realised something interesting.

In 1e, all porté sorcerors had their hands gradually and permanently stained blood-red, like a birth-mark, as they used their magic.  This meant that they could be easily identified by inquistors and the like, for burning.  On account of this, gloves were high fashion in Montaigne, and backed by l'Empereur.