During the "hobbe cave quest" the are 2 silver keys!1:next to the cottage in the circle of flowers.. 2:the other is in the last chamber(focus site) in the cave itself in a small corner in a circle of mushrooms.... Just do the quest as normal until you are almost finished (DO NOT LEAVE THE CAVE!) then do a hero save and either let the kid die or reload..voila 2 silver keys and a bunch of exp that you can do over, and over, and over, and over..............etc