Cloud giants ?

Hi I have found the cloud giant and I am trying to rescue the warriors I have search all over I have covered most of the area and I can’t find a key.

When I try to go to the door it tell me there is a cloud giant there and I don’t want to disturb him .?..

I was able to kill all other one and the only one left here is the one that want to throw me down to earth
I even tried that lol.

What am I missing.?.

There you need lockpick greater than 90.