...but I have 4 keys in my inventory and I don't know what they unlock. I'm assuming they're all to be used somewhere in act 1.... I have a silver key, a saphire key, a big key that looks like a battlefield key, and a smaller one called 'key' that has a yellow star at the end and a blue 'key' part of the key. I have completed all quests, and tried all the locked chests in the sleeping quarters, but no luck. Anyone know what these keys are used for?

EDIT: I also found a key in the empty dungeon number 2 in the battlefields, though I assume it's just randomly there and doesn't open anything...