The Watching Stone unwillingly divulges more information about Borangos' beginnings which could be an advantage in the future if you hope to ever defeat the creature.
The carven rock focuses a beaming gaze upon you. Strange sounds begin to echo in your head. There is a grinding of rocks, a pick-axe strikes and voices echo through a cavern.
A driving pain seems to emanate from the watching stone and seize your head and chest. Images swirls through you and time seems to stop. You close your eyes yet you can still see. Everything looks different as if you are seeing the world through another's eyes.
Before you is Nargroth, but it is not ripped apart by the flames and fires of Mount Doom. There are dwarves and men on scaffolding working on walls in the cavern. Some have stopped working and instead gaze upon a doorway that is much, much older.
The images fade and you hear an explosion and screams. Those sounds fade as well. The stone is silent and has released you from its grasps. You are uncertain if the watching stone has shown you this memory of Nargroth for a purpose. Perhaps you will be able to search for some of the remnants of the ancient seal you saw in the vision.
Ancient ward fragments can be found around Nargroth.
You should collect some fragments.
Isnír can be found at the Udûn Foothold.
You should bring the ward fragments to Isnír.