After days of traversing this perilous, trap-laden dungeon, you emerge in a large cavern - a towering mural dominating its furthest wall.  
Passing rows of acolytes in odd yoga poses, you realise on approach that this is no mural, but an ancient apparatus - so colossal that it extends neatly to the end of your vision. An impossible collection of decorative hinged panels and gears, it appears able to twist in on itself - shifting to expose further treasures? 
The guard hails you…