I just got a Mystery Box (Fall) and I do not know what to do with it. It won't let me open it or what not. It will only left me 'gift' it. Is this an error or is this how these boxes work?
They are dailys. You can also go into the shop area to buy new clothes (many for cheap). If you need quick funds, buy a weapon in the Shop (I suggest a crowbar) and go into the Battle Arena. If you focus on the weaker monsters at first, then you'll be able to make money fast as your level.