I've been trying to get through a locked door at the academy level 3 where you're trying to beat Samuel to the exit. It's the one past the series of five levers. I read an earlier post that there's supposed to be a saphire key under a rock pile...but I've wandered around forever and can't find it. There's also another locked cell door with two locked chests that I can't open either. Does that have something to do with it? I'd appreciate any help!