What caused this Black Fog, is it Magic, or maybe some other source?
The final Quest that was given, will make Black Fog bearable for a while, New Guards in the City can feel at ease now.
If Teleporting will be unavailable at the Water Shrine, then have to prepare Fully for anything.
Of course going through the Water Sanctum could be Simple, because it was Easy at the Wind Sanctum.
The Monsters at the Water Sanctum can be Powered up though...
Since it is the Water Sanctum, there maybe lots of Quality Water there!
High Quality Water is needed to make the best possible Medicine.