Ok, so one of the disappointments of Breath of the wild would be the lack of any "true" dungeons. Zelda games have been getting easier, but Breath of the wild was overall a welcome exception, and hopefully setting a new trend, but we couldn't experience this challenge in a dungeon. Hopefully the DLC will cover that. I hope it will be hard as nails. I hope it will have a water theme, because I love the sound of wannabe fanboys crying. What's that expression? "In water, no one can see you cry?" I believe that's it.
On a sidenote, I got curious how to pronounce cistern, wikipedia says "cistun" (I can't do phonetics), like Bob suggested, while all Youtube videos pronounce the 'r'. In other words, I still don't know. Maybe it's an American vs real English thing.