So this is pretty cool. Turns out she says one of four things to you in the finale quest.
She whispered to me;
“Yes, bring your ‘allies’ to me, my blade. Drive them to the brink! For you have become the weapon that I now wield”
And that’s apparently because I both did her Legendary Weapon quests in Legion and have the Servant of N’Zoth achievement. Because obviously I do it was fun as hell getting to do FFA PvP in BFA.
But if you’ve only done the Legion questline you get;
“After we shared so much, you simply threw me away. I will savor the taste of your insanity. Just let go”
If you’ve the title but didn’t do the Legion artifact questline you get;
“I told you that you were destined for great things. Rejoice, for you have aided the end of all things”
And if you’ve done neither you get;
“Your world is dying. Breathe deep and accept that you have caused your end”
This is honestly pretty cool and makes me wonder if we’ll get anymore complex interactions like this in the future. And I wonder if that Servant of N’Zoth toy that let you become hostile to everyone won’t see a comeback. Either way I’m A Okay with Xalatath wanting to grab me by the hilt.