So I was running around Glenumbra and I spotted a runstone with a blue glow just outside Daggerfall. When I tried to interact with it, it faded away. It was kind of creepy, like a ghost from the past...
I saw a phased instance of a Blue node last night in the game. It went away as I approached it. I think it was near Stone Falls, so it might have been one of the Alchemy Writ Training quest nodes.
Enjoy the game, life is what you really want to be worried about.
PakKat "Everything was going well, until I died"
Gary Gravestink "I am glad you died, I needed the help"