Ignore last 3 minutes of this video or so, it’s just an empty black screen (unless you enjoy watching a black screen). Not sure what happened there!
Kick back and relax in the gameplay series in Valheim – A Viking Survival Game
Episode 5 – I finally work out how to upgrade the workbench and some of my items
#stinarchi #valheim
Source
It’s not the water killing you but running out of stamina in the water.
For your next one dungeon, you can break the evil bone piles in the burial mounds to stop the skeletons spawing
I think you can destroy stone pile to get stones back