Pretty sure this is a bug.. it is also really handy as well
*BUG*
Click mage's hand as if to fire a spell, leave it there and go into the inventory, put a torch into the same hand, exit. You can now cast spells in the hand which is currently holding a torch
Nonetheless, he could be working on a patch on the side or the other programmer of AH could be working on it, or there could be a plan to once the Editor is done... Who knows...Hence why i asked