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Capture Isobel the Selûnite Cleric is a sub-Quest of 
in Act Two of Baldur's Gate 3. It can be started by speaking to Z'rell or Ketheric Thorm in Moonrise Towers.
Objectives
Objectives and journal entries may vary pending story decisions and outcomes.
- Z'rell, Ketheric's enforcer, told us to kidnap Isobel from Last Light and bring her to Moonrise Towers. If we do this, Last Light will no longer be protected from the shadow curse.
- Ketheric told us to kidnap Isobel from Last Light and bring her to Moonrise Towers. If we do this, Last Light will no longer be protected from the shadow curse.
- Isobel died during our attempt to abduct her, but a ghoul carried her off anyway. We should go to Moonrise Towers, and see what happened.
- We captured Isobel. We should return to Moonrise Towers, and report back to Z'rell.
- We tried to capture Isobel, but she died. We should return to Moonrise Towers, and report back to Ketheric.
- We captured Isobel. We should return to Moonrise Towers, and report back to Ketheric.
- We captured Isobel. Z'rell was pleased. She's granted us an audience with Ketheric at the rooftop chapel.
- Our failure to bring Isobel angered Ketheric, but he will still allow us an audience with the Absolute.
- We angered the denizens of Moonrise Towers; Z'rell may not want to reward us for abducting Isobel anymore.
- We captured Isobel and sent her to Ketheric.
Walkthrough
This quest is a variant of .[note 1] It can be initiated when reaching Moonrise Towers and returning the Nightsong to Ketheric Thorm during . The party receive a mission from Disciple Z'rell after helping Balthazar capture the Nightsong. Z'rell congratulates the party for completing the mission but explains that there's one more task before she can grant an audience with Ketheric Thorm. Thorm seeks the safe return of his daughter, Isobel, and has sent a spy, Marcus, to the Last Light Inn to acquire her. Z'rell orders the party to aid the spy in capturing Isobel.
Meeting Isobel
After arriving at the Last Light Inn and gaining Jaheira's trust, the party can ask Jaheira how to get past the shadow curse as part of . Jaheira refers the party to the Isobel a cleric of Selûne, the woman responsible for the Last Light Inn's special protection. Isobel is upstairs on the balcony of the only separate room on this floor, reinforcing the Inn's barrier with the power of the moon.
Isobel instantly recognises the party as the True Souls with free will and provides them with a Blessing of Selûne. She explains that the blessing provides resistance to the lesser aspects of the curse, but is not enough to stave off the deepest parts of it. If the party betrayed Kar'niss during and gave the 
Moonlantern to the Harpers, Isobel gives the lantern to the party. Otherwise, she simply mentions that the Harpers are working to learn how the cultists are surviving the shadow curse.
After wrapping up with Isobel, she hears something strange. Suddenly, a Flaming Fist named Marcus flies down to the balcony. Marcus telepathically reveals that he was sent to capture Isobel alive. The party can use a Wisdom check (DC 6) to probe further into his mind, revealing the task is of great importance to Thorm. The party can also tell him no, or say they'll help him. Isobel asks what's going on, and the party has an option to reveal Marcus' plan or state their intention to aid him.
Meeting Marcus early
If the tieflings were not saved during , either by raiding the Druid Grove or ignoring the quest, the events play out slightly differently. When Jaheira confronts the party at the Inn's entrance, Marcus comes forth to vouch for them. He uses his telepathic powers to tell the party to follow his lead, revealing himself to be a True Soul spy. After the confrontation, Marcus can be spoken to in Isobel's room upstairs, where he explains that he was sent on a mission to kidnap the cleric. The party can either attack him or agree to help him.
Battle at the inn
Marcus prepares for battle and summons his minions - six Winged Horrors. If the party sides with Marcus, then they face Isobel, Jaheira, Harper Bor, Harper Essius, Harper Naysa, Harper Mijah, Rolan (if alive), and Cerys (if alive). The party does not need to fight anyone beyond Isobel, where the goal is to knock her out with non-lethal attacks.
The fallen inn
If Isobel is captured or killed, the Inn falls. Everyone besides the party and Jaheira, who are protected by Selune's blessing, are either killed immediately or transformed by the shadow curse. The party faces a massive battle against the shadow cursed residents: Harper Karrow, Harper Terradisia, Harper Antony, Harper Chenti, Harper Lassandra, Harper Branthos, Harper Elindale, Harper Callie, Fist Ulthred, Harper Darragh, Harper Donner, Harper Elifer, Harper Skywin, Harper Teebs, Harper Essius, Harper Tumeril, Harper Meygan, Quartermaster Talli, Harper Hangfar, Harper Manus, Harper Lymn, and Dammon (if alive).
Additionally, Shadow Creepers pop up to join the undead, eventually joined by a Giant Shadow Creeper.
After the battle, if Jaheira survives, she states her intention to go to Baldur's Gate for more support. The party can either wish her luck on her journey, or suggest she join the party, to which she agrees.
The party can now return to Moonrise Towers and report to Z'rell. Depending on if Isobel was successfully kidnapped or died, Z'rell sends the party up to gain a reward or face judgement from the Absolute as part of the final segment of .
Consequences
Losing the Inn has many far-reaching consequences. If the party did not speak to Counsellor Florrick on the ground floor, then she does not move on to Baldur's Gate and dies in the Inn. Art Cullagh also dies, preventing the completion of and . If Dammon has not been spoken to, Karlach's personal quest, can stall since he can no longer fix her engine.
If Isobel is kidnapped, she appears at the end of Act Two during . Once the party reaches the bottom of the Mind Flayer Colony and is about to confront Thorm for the last time, Isobel is there as well. She has been infected by Mind Flayer Tadpole and enthralled with strange magic to keep her compliant. If the party aided Thorm in kidnapping her, she thanks them and says she was a fool to resist, then wishes them the best of luck in the City of Judgement. When the party fights Thorm, Isobel aids him. Even if the party manages to kill Thorm while leaving Isobel alive, she dies immediately after the battle.
Quest rewards
Gift from the Absolute, if Isobel is successfully kidnapped.
Footnotes
- ↑ It's possible to complete both this quest and in the same playthrough. In this instance, the party rescue Isobel from Marcus and then return to Last Light Inn to kidnap Isobel alone. There is no special cutscene, the party attack Isobel.