I’m having one of those “I was never properly educated” Siobhan moments.
Is there any reason why a very careful and precise thaumaturge couldn’t cast through a circle made from their mouth? Or possibly their tongue, rolled up or curled back on itself? You’re not casting through your flesh, after all, no more so than casting through a circle made of your fingers. It feels like one of those things, like casting through your feet, that most people wouldn’t really consider. But would it be feasible?
@AzaleaEllis is this spoilers or can you tell me if it’s theoretically doable?