Minor Anomaly

In the Alpha, the third key was in the chest.  I have looked everywhere, asked everyone and cannot find the third key.  It is not in the chest.  Is this a bug or did it change?  HELP

We changed the key's position, it's not a bug.

New position if I am correct, is somewhat sneaky. In south-west somewhere...

I can't find a third key either. I found one indeed in the south-west. Fellow players said another key would be under a movable rock, but I found none under any movable rock...

If you really need help finding it, message me in-game, I got the key locations,

I have been back to minor 4 times now.  I have talked to others and even received pics of where keys are supposed to be.  I have found 2 keys but the third key is nowhere to be found.  It is not under any movable rock.  I found one in a bush, and the one by the river but cannot seem to find the other one.  Is it possible that the key is not there?  Please help me.

Hi. I found third key - South-East, under moveable stone/ At first you move stone to the right of the bridge and then 

can anyone tell me what tool i should use to break the purple crystal and icy barrier respectively?  And, what does two fire pits near the camp used for?

When you continue playing and levelling up your hero, you will start finding tools to break barriers in chests. Once you find the tools, they will tell you what you can use them for.

I don't think there's any use for the fire pits.