Being serious, I'm trying to decide which camera(s) to take.
What I would advise is:
Taking the camera out in such low temps, will shorten the battery life, keep spares in an inside pocket in your jacket to keep it as warm as possible.
Maybe the camera will stop working in such low temps, but I'm sure it won't do any permenant damage, so long as it's brought back to normal temp slowly & carefully.
What may well damage your camera, & certainly stop you taking photos for a while, is when you bring the camera back indoors after it's been in the cold for some time, it will get condensation immediately over the outside of the camera but worse still, inside the lens & camera body, this may take some time to clear, an hour or two.
What you need to do before you bring you camera back inside is to first put it inside a close fitting plastic bag, then put it inside your camera bag, & allow it to slowly return to indoor temperature, could take a while.
Therefore the best plan is, if you can, take two cameras, one for for use outdoors, the other for use indoors (this one should be kept inside your camera bag & maybe inside your jacket).
This worked for me a few years ago the last time I went to Finland in the winter.
Good luck, & enjoy Lapland
ps, don't forget to ask Father Christmas for that new camera body or lens your after