We're excited to announce that we've fully migrated the Xbox Forums to their new home, here on the Microsoft Community forums!
As of today, going to forums.xbox.com will redirect you here to the Xbox area of the Community forums. We've moved all of your existing threads over so you can continue and start conversations with the new forums experience.
We sincerely appreciate the feedback you have provided over this transition and can't wait for you to check out the new Xbox Forums!
Even if it doesn't remember it, you can still get the other fifteen, assuming you handle it correctly. As it's possible to lose the chance to acquire 15 artifacts, with certain quests anyway, like Clavicus Vile's quest.