This article will guide you through all the choices regarding Nightsong and its outcomes. This will help you to decide whether or not you should help Balthazar. Refer to the below-linked video for the complete walkthrough.
Let Balthazar Take Nightsong
Allowing Balthazar to take the Nightsong may seem like a good way to avoid confrontation, but it’s a horrible decision in general. However, keep in mind that selecting this choice will result in Shadowheart leaving your group.
Select dialogue: “Go on, then. Take the Nightsong to Ketheric. Get it over with“
Save Nightsong (Spare Nightsong)
To preserve Nightsong, first, you must confront and defeat Balthazar.
Then you must convince Shadowheart to quit Shar and not kill the Nightsong, which is no simple task. If you’re set on going this way, you must pass the persuade check with a point value ranging from 14 to 30.
If you pass successfully, then Shadowheart will throw her weapon capable of killing Nightsong, but Shar will also shun Shadowheart forever.
You will obtain the rare Moonlight Glaive and legendary Selune’s Spear of Night weapons after saving Nightsong. Nightsong will assist in the struggle against Ketheric Thorm. Shadowheart will be free of her duties to Shar if you romance her.
Shadowheart Kills Nightsong & becomes Dark Justiciar
Shadowheart will spear Nightsong to death with the Spear of Night. This act will grant Shar’s blessing to Shadowheart. Select the below dialogues.
Trust Shadowheart – do not interfere.
“Kill her. Let’s finish this ritual.“
Defeating Nightsong comes at a cost. Isobel and Jaheira die, and the tragedy extends to Last Light Inn where everyone will die. This will also halt your progress on a number of quests. If you romanced Shadowheart, her loyalty goes fully to Shar, and your relationship with Shadowheart takes a backseat.