Thela Bonmar

Temple of the Deathwyrm
If you go there while still on Heroic levels, she will reply:
 * Thela Bonmar: Don't waste my time. I'll only speak with someone capable of defeating Aurgloroasa.

When at level 20 or more, if you talk to her, she will reply:
 * Thela Bonmar: So you plan to challenge Aurgloroasa and the Cult of the Dragon? Very well. Her end is foretold, after all.
 * Thela Bonmar: Still, it's no easy thing to bring down a shadow Dracolich. First you'll need to destroy her emissary, Sarva Bellistrae, and her Cult of the Dragon followers along with her.
 * Thela Bonmar: Only when the emissary is out of the way will you be able to confront Aurgloroasa.
 * You: Where can I find this emissary?
 * Thela Bonmar: You'll find Sarva down near Aurgloroasa's lair, of course. That babbling sycophant can't bear to be away from her dark mistress!
 * Thela Bonmar: Go into the ruins, down to the old marketplace. Sarva and her followers will surely be near the entrance to the ziggurat.
 * Thela Bonmar: Once you've dealt with the emissary, return to me. I'll tell you how to gain access to the Dracolich herself.
 * You: I'll get rid of the emissary. (Bestow quest)
 * You: Who is this emissary and why is she so important?
 * Thela Bonmar: Sarva is the ranking human in the Cult of the Dragon. With her gone, Aurgloroasa will lose a charismatic leader and her public face. The Dracolich prefers to remain deep in the shadows.
 * Thela Bonmar: More than that, Sarva has been the one negotiating Aurgloroasa's treaty with the Netherese. Kill Sarva, and negotiations would have to start all over again.
 * You: Where can I find this emissary? (See above)

After you defeat Sarva and return, she will say the following:
 * Thela Bonmar: So Sarva Ballistrae is dead? How very sad. Still, the doom of her kind has been foretold, and we must prevent an alliance between Aurgloroasa and the Netherese at all costs.
 * Thela Bonmar: The pawn is gone, so let us move on to the queen. I hope you are well-prepared to destroy Aurgloroasa. It will be no small task.
 * You: I believe I'm up to it. Tell me how to get to Aurgloroasa.
 * Thela Bonmar: You must first enter Aurgloroasa's Lair - here, take this key. It will let you enter the ziggurat.
 * Thela Bonmar: Then find the phylactery that holds Aurgloroasa's soul. Only after destroying it will you have any hope of defeating her. But beware - she's been planning for this day for centuries. She'll use all her craft and cunning to protect her phylactery.
 * Thela Bonmar: I do hope you plan on bringing some help along. It will take a small army to bring Aurgloroasa down.
 * You: We'll put an end to the Shadow Dracolich. (Bestow quest)
 * You: Why do you care about an alliance between Netheril and the Dracolich?
 * Thela Bonmar: What do my motives matter? You should worry about the threat to your precious Cormyr instead.
 * Thela Bonmar: Do you really want an Ancient Dracolich loyal to Netheril here? On your border? Ready to strike at a moment's notice?
 * You: That's an evasion. Tell me why you turned against the Dracolich.
 * Thela Bonmar: Let's just say that I have seen the future, and it does not include Aurgloroasa.
 * Thela Bonmar: If you have doubts, put your mind at ease. I am perfectly sincere when I say I want this Dracolich destroyed just as much as you do.
 * You: I believe I'm up to it. Tell me how to get to Aurgloroasa. (See above)

Talking to her after acquiring the raid, but before completion, will make her say:
 * Thela Bonmar: Go to Aurgloroasa's Lair, and end her!

On completion of raid, she will congratulate you with the following:
 * Thela Bonmar: So Aurgloroasa has been destroyed? It is the end of an era, indeed.
 * Thela Bonmar: I suppose you did this to help Cormyr? I'm sorry to say I have seen the future, and it doesn't lie with any human kingdom. Nor does it belongs to those dusty, decrepid Dracoliches that Sarva and her followers idolized.
 * Thela Bonmar: No! The future belongs to the dragons - living dragons - and their faithful servants! So let me thank you for aiding the new Cult of the Dragon ... a purified Cult, free from its foolish devotion to Dracoliches!

After completing the raid and take the reward, if you talk to her again, she will reply:
 * Thela Bonmar: ??????????