Pass on Brahm's regards and show the Remnants of the Rift Shard.

Quest Text It may take some time, but we'll change this world.
We'll continue until there is no more sadness under the sun.

Summary ...Indeed, everything written in Brahm's letter was true.
What kind of place this is, who we are...you may have so many questions,
but please don't ask them at this time. I believe we shall meet again in your travels.
Let's speak in greater detail at that moment.

Summary ...indeed, everything written in Brahm's letter was true!
Long time no see, Adventurer. Good to see you again here.
Haha. At this rate, perhaps we should make you a member of us Kalshurnise.
I didn't think we would bump into you again to discuss matters about Star's End.
This is truly the fragment of the Blackstar, the Remnants of the Rift.
I've seen people hold auctions over this item.

Summary You've returned, albeit alone...
Hmm? What's this? Seems like the claw of some beast...
Oh my...! Where did you get this?
I didn't think such a thing would actually exist!
That there is material you can process into a weapon!
You found it at Star's End, correct? Wow... It's truly a thing of beauty.
Go find Dorin Morgrim NPC Knowledge, the legendary blacksmith.
His talent is unmatched!