You can “Reach the skies above the Exiles Lands” easily, without cheats or building anything.
Using the unlimited climbing stamina method mentioned in my other guide, you simply climb the volcano!
Apply Advanced Flexibility Kits to the following:
Any warm, light chest piece. Preferably Exceptional or Flawless.
Any warm, light leg-wear. Preferably Exceptional or Flawless.
Any warm, light or medium headgear. Preferably Exceptional or Flawless.
You’ll use 0 stamina while climbing with this gear and you should be warm enough.
Climbing Location Screenshots
Climb either the left or right, it doesn’t matter. You’ll get the achievement before you reach the top.