Thank you warty, that is an exelent responce.
Agent, I understand your concerns, but in my very first post in this thread I established that physics apply EXCEPT when it comes to the physiology of the Drakes. I'd be more concerned about that if this was for science fiction, but though I hadn't gone looking for a specific explanation, the magic system I've got for their setting would handle this without comment, despite not being practical for casting- in fact, it's use to give a supernatural physiology would actually reduce their natural casting abilities making having their equipment be practical all the more important.