Hey, man. About your witch? If my research is correct, traditionally power is gathered by the left hand and sent out by the right.
So, if she’s a “traditional,” she’s either taking power from an otherwise invisible dragon, or she’s attempting to bait one here rather than summon one here by stealing it’s power from a great distance.
–Or maybe it follows that she happens to be the one-in-a-million that is physiologically reversed? Heart on the right, brain hemispheres swapped? Then she could be doing just about anything dragon-themed while sending out energy.