There are 12 Rune Switch Puzzles hidden in Tiny Tina’s Wonderlands. When you found one, you need to activate it and then retrieve the 3 puzzle pieces that get scattered around the map. These puzzle pieces need to be retrieved within a certain time limit (2 minutes in Mount Craw) or else the challenge fails and you have to start all over again. However, when you succeed you will be rewarded with a lootsplosion.
Once Tiny Tina’s Wonderlands has been released, I’ll update this article and add a full guide where you can find all of the puzzles and pieces. So stay tuned!