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This article is about the quest. For the dragon, see Paarthurnax (dragon).
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 Detailed Walkthrough
This quest is given to you during or after The Fallen if you talk to Delphine or Esbern. When the treaty conference is held, if you haven't yet spoken to either of them, Delphine will approach you and start it automatically. You can avoid her if you run out of the conference room quickly enough. If you have finished Civil War questline, Season Unending won't be triggered. After you complete the main questline and defeat the World-Eater in combat, you may return to Sky Haven Temple and find Delphine and Esbern outside the temple. Esbern will tell her about his nightmare. After their conversation, Delphine will approach you and trigger this quest as normal. You will not have any other dialog option available with either of them until one of them gives you this quest. Delphine and Esbern have discovered that Paarthurnax is the Master of the Greybeards. Esbern will tell you that Paarthurnax is an ancient enemy of the Blades, and that his oath as a Blade prevents him from giving you any further help until you kill him.
Paarthurnax will be at The Throat of the World. If you talk to him after the conversation with Esbern, he acknowledges that all dragons thirst for dominance and that the Dragonborn shares this thirst, though he believes that he has overcome this in-built nature through sheer willpower and that he can be trusted.
If you talk to Arngeir and tell him that the Blades want Paarthurnax dead, he will tell you that - although what Esbern said is true - it was because all dragons were in league with Alduin at first, and that Paarthurnax could not help it. He will go on to say that Paarthurnax did eventually rebel against Alduin, and was instrumental in Alduin's first demise. However, Delphine thinks that his betrayal actually makes him worse, because it could mean that he might betray the Dragonborn in turn. You are given the option to tell him Paarthurnax must die or that you are going to spare him. This will affect the conversation between Esbern and Arngeir if in Season Unending you are forced to negotiate a treaty.
Paarthurnax is an easy foe for those who are leveled sufficiently, comparable to the average Frost dragon. You will receive a dragon soul and the usual set of bones and scales upon defeating him.
Killing Paarthurnax will enrage Arngeir who, if you return to High Hrothgar, will angrily lecture you on your decision and even go so far as to threaten violence if you do not leave. After this, the other Greybeards will also fail to acknowledge you. On the other hand, the Blades will talk to you again.
If you let Paarthurnax live, there will be a short scene with him after you have defeated Alduin for good, and he will tell you that he will try to round up the other dragons and bring them into the Way of the Voice, teaching them how to be peaceful. However, this does not make gameplay any different - some will attack and some won't unless you attack them.
If Paarthurnax dies:
- Arngeir retracts the Greybeards' hospitality, and it is no longer possible to ask him for the locations of word walls.
- Paarthurnax will no longer be around to provide meditation bonuses to certain shouts. If you already have a bonus it will not go away; you will just be unable to change it.
- The Greybeards will not hold a ceasefire meeting, making the civil war questline mandatory to proceed with the main quest unless you have already completed Season Unending.
- The Blades will welcome you once again and support you on Dragon Hunting missions.
If Paarthurnax lives:
- Arngeir will still disclose the location of word walls.
- Paarthurnax will still provide meditation bonuses for shout words.
- Paarthurnax will appear for an extra cutscene after Alduin's defeat, wherein he details his plans to rein in the dragons and teach them to live under the Way of the Voice. After this the quest will disappear from the journal.
- If you have not brought three people to the Blades already, Delphine's recruitment quest will remain uncompleted.
- If you have not already obtained the potion from Esbern's Dragon Research, you will be unable to do so.
- Taking anything from Sky Haven Temple will count as stealing.
It is entirely possible to recruit three followers for Delphine and receive the Dragon Infusion potion from Esbern before being given the quest to kill Paarthurnax. The only real consequence of not killing him is no longer having dialogue with both Delphine and Esbern, and thus no longer having the option to go on Dragon Hunts with your recruited Blades. They still, however, act like regular companions. The period in which you need to complete the recruitment and receive the potion is between the quest Alduin's Wall and reading the Elder Scroll step of Alduin's Bane. It is possible to acquire the quest even if you finished the civil war quest-line thus not acquiring the quest Season Unending.
- Because Delphine and Esbern are always essential characters and cannot die it is not possible to kill them to protect Paarthurnax. As there is no way to actually reject the quest (aside from ignoring the Blades), once this quest is started, there is no turning back.
- It is entirely possible to still have the Greybeards remain friendly to the player by finding every Word of Power within Skyrim before killing Paarthurnax.
- If this quest is obtained during the main quest and is not completed prior to finishing the main quest, it will disappear from your active quests. If you kill Paarthurnax at this point, the quest will reappear correctly.
- It is unclear why, but Paarthurnax's health will sometimes regenerate, making it impossible to kill him. At what point in the game the regeneration begins and ends remains to be determined.
- It is possible to bypass this bug by attacking Paarthurnax with Mehrunes' Razor.
- Fast traveling away and back when Paarthurnax's health meter is empty may trigger Paarthurnax's death.
- Ordering a follower to attack Paarthurnax may circumvent this bug.
- Often, Delphine will still allow you to recruit followers even after you have been told to kill Paarthurnax. Therefore, it is perfectly possible to complete that quest and not kill him.
 Quest Stages
- The following empty quest stages were omitted from the table: 10, 15, 30, 150.
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