Its the environmental puzzle in Luculla forest south of the mines entrance.
This platform pass the wooden bridge has 6 pressure plates. Also two totems that shoot poison. At the other end of the platform is a wooden wall and pass that is another platform covered in poisonous cloud with 5 vents I think.
What am I supposed to here with the pressure plates? I assume solving this puzzle makes the poison gas go away but it's seriously driving me up the wall. Help!
