With Flickering Heart

With Flickering Heart is a quest in The Witcher 2: Assassins of Kings. This quest is obtainable only by choosing to follow At a Crossroads: Scoia'tael quest line.

Walkthrough
You can start the quest after the council meeting in Verden with Saskia and rest of leaders. The quest is given by an elf, Ele'yas, in front of The Cauldron, the tavern near the notice board.

Before proceeding to the catacombs, remember to buy surgical tools from Felicia Cori in Rhundurin Square in Vergen. This quest item is necessary to gather evidence from one of the bodies in the catacombs, the fresh corpse.

After examining the body, find Dandelion at the inn to proceed. After that, proceed to the burned village at midnight to lure the succubus with a ballad. The lyrics should be as follows:


 * Should our bodies ever sing with pride
 * My heart would ask your white hands
 * Whether they would hold it
 * As you open my chest wide?

or
 * Choose option 2nd, 1st, 2nd

At this point, the player is in control of Dandelion rather than the witcher. As Dandelion you can either choose to enter the succubus' lair my means of a trap door which opens or inform Geralt who takes over the investigation. After talking with the succubus, you will be able to choose to side with either the succubus or Ele'yas.
 * To side with the succubus, you'll need to inform Iorveth and for that, you'll need the metal shard extracted from the body earlier in the catacombs using the surgical tools bought from Felicia in the market.
 * To side with Ele'yas, return to the succubus' lair and kill her off.

Rewards

 * If you side with the succubus you will have an option to bed her and will have a chance to receive some orens (this amount may be different from time to time) as well as a Rook potion and Thyssen's armor.
 * If you side with Ele'yas, he will give you some orens and the sword Angivare. Then after you kill the succubus she will drop:
 * a moon rune
 * a crafting diagram for diamond dust
 * 1x Blue meteorite ore
 * 1x Robust cloth
 * 1x Silver ring
 * Succubus' wand

Either side has its advantages but you may want to side with the succubus. If you have played your cards right you should already have a better weapon (Kaedweni black sword) and a Robust red meteorite sword.

Although, the Kayran's chest piece could be considered better than Thyssen's armor, and you may want to go with the sword.

Journal entry

 * And now let me tell you how I solved a crime in Vergen with a bit of help from Geralt, who started the whole thing by talking to the elf Ele'yas. Ele'yas thought he would need a witcher, but had no idea that a poet would prove to be key to the case! Young men, both elves and humans, were being murdered in Vergen. The elf said their bodies were being found near a burned village located at the mouth of the gully leading to Vergen, and subsequently being interred in catacombs beyond the town. Geralt took it all in and began to wonder if he should go to the crime scene or the burial site.


 * As Geralt searched the burned village for clues, he could not help but notice a pervading scent of sulfur, a scent so characteristic and strong that it obscures all others, as I'm sure you know. Odors at the site of a fire are nothing unusual, but the added scent of sulfur can mean only one thing to a witcher – that a succubus is or was near. Finding no other traces of the beast, however, Geralt noted his suspicion and set off for the dwarven catacombs to pursue his other lead.


 * The witcher examined the bodies of the victims and, based on his professional knowledge, concluded that the a (sic) succubus had killed the men. Also, Geralt found a book, a tome of my poetry, on one of the corpses. Whosoever doubted that humans and beasts alike admire my oeuvre and love me, should doubt no more, as this was proof positive of my fame. In any case, the witcher had hit a dead end and came to talk to me.


 * The book the witcher found had been stolen from me some time before. Needless to say, I was glad to recover it. This clue suggested that the succubus was an avid fan of poetry. Thus, I had no choice but to return to the village to lure the beast out with some moving lyrics. As many an epic romance states, and as Geralt reassured me, succubi are nocturnal creatures, so the witcher and I agreed to meet at midnight.


 * The succubus literally ate out of my hand – such was the power of my poetry. With my aid, the witcher could speak with the demon. According to the beast, t he murderer was the elf Ele'yas, a jealous lover, for you must know that the succubus had many lovers, all the murder victims among them. Geralt listened to her testimony and went to speak to the elf.


 * Obviously Ele'yas protested his innocence. And, to be honest, Geralt and I had no evidence to prove either his or the succubus' guilt beyond a reasonable doubt. The word of a monster against the word of a bandit – the decision was hard indeed.


 * Siding with the succubus:
 * Geralt decided to accuse Ele'yas. He presented what little evidence we had gathered to Iorveth. The Scoia'tael leader wanted to talk to his subordinate, but Ele'yas was far away by then – he had fled. Still uncertain of the elf's guilt, the witcher went to tell the succubus everything.


 * Geralt decided that Ele'yas – guilty or not – would sooner or later kill the succubus. The witcher's discussion with the elf quickly escalated into a fight, and Geralt slew the Scoia'tael. We will never know if Ele'yas was truly the murderer, yet we think this very likely. Either way, the witcher decided he deserved some reward and went to see the succubus about it.


 * I will not describe how the succubus rewarded Geralt. I leave that to your imagination, dear reader. I will note only that the witcher seemed more satisfied than he usually was upon receiving a bulging pouch of orens. All in all, the adventure with the she-beast ended well for us. Were there no more murders in Vergen? That I do not know, for we were soon forced to leave the proud dwarven town and, alas, I received no more news from there.


 * Siding with Ele'yas: