I thought I should point out that, given the current circumstances at the Rarun mines, the slaves are not going to be easily freed. That includes you guys. If it was as easy as using one of your powers, you would have escaped already. The slavemasters have already considered most things you would have tried and they have countermeasures in place.
That doesn't mean that it's impossible to escape; I'm not running this entire campaign at the salt mines!
Just keep in mind -- and this is sorta metagaming, but I don't care -- the story starts at this particular time and this particular day for a reason. I have a plan that is about to unfold...