Fiendish Puzzle Box
Not clearly magical but just the product of fine and intricate craftsmanship, this box has no obvious lid or clasp. However, on pushing a particular corner, geometric patterns extrude from its surfaces. Manipulating the patterns should lead you to opening it eventually, but whenever you feel like you’ve almost opened it you find yourself inexplicably back where you started. You’re sure that with time, though, you will be able to work it out.
When you make camp and spend your watch trying to open the box, roll+INT. On a 10+, you manage to open the box. On a 7-9, take +1 forward to your next attempt to open the box. Either way, take -1 ongoing to Take Watch rolls tonight, if any.