This riddle is just plain stupid.
A good riddle is founded in logic using clever misdirection. This is just an unholy waste of time. To begin with, a*suming the mirror IS magical and CAN alter reality, it says I see WHAT I saw. Not a saw. So if I were to take what I saw I would either get:
A. Another table or a duplicate of me or...
B. Nothing because I haven't sawed anything yet.
The rest I'm not even going to waste my time on because it's all based around moronic spelling errors.