Ori and the Blind Forest

The Element of Warmth is the final element in the game. This achievement is story related and is unmissable. This occurs in the Mt. Horu area of the game and requires you to complete the puzzles in Mt. Horu to gain access to the Element of Warmth. Once you are there, click to activate and the achievement unlocks.

Be warned this activates the end of the Mt. Horu section and starts the final sequence of the game so make sure you are done in Mt. Horu before activating.