If it's been raining, I would check or ask neighbours to check their garages/sheds. If you haven't done this, I would also put up a couple of flyers at the local grocery store/post office/corner store etc.

I would still put a live trap out and make a covering for it to protect the cat from the rain. I would also put something with your scent on it (ie: sweatshirt, shoes etc) in the trap with some of Mystic' favourite food.

Don't give up hope!! Many cats do fine outdoors for extended periods.

Keep us updated! Come home Mystic, many people are worried for you!!