Shadowheart tried to kill your character? o.0 that's new. She never was anything over snarky, but only that.
I'm not sure it's possible to trigger that scene anymore, since now when you travel the artifact will teleport to your character. Shadowheart's answer if you ask her about the fact that you have it now is kind of funny, thouhg; basically "I will have to take it back at some point" with her murder face on.
Ah, you're talking about the old ultimatum, it's been removed on Patch 5. Well, then you created a situation for that. In this case, any of the companions will have a scene for something similar, if you try it.
