7

In some questions (see this one, for instance) it is reported that, according to what was stated in the books and proved in the TV show, wights and white walkers can be killed using a weapon that was forged with dragon fire:

  • obsidian
  • fire itself (for wights)
  • Valyrian steel

Fire and obsidian was proven effective against wights in the last episode of season 7, where

Jon Snow confirmed that the wight brought to Cersei could be killed "by fire" or "with dragonglass"

However, due to the events happening in Season 7,

Viserion was killed and brought back by the Night King.

Does dragonglass or fire work in this situation too? I ask this because

Viserion (a wight) is actually a dragon, it can produce fire itself (probably, as discussed in this question), and it is said that obsidian is either created by dragons or by fire in the Earth (source)

  • 2
    A little bit of confusion. We don't see any WW killed by fire, and Viserion is a wight and not a WW. Finally, the fire produced by Viserion is not regular fire – Kepotx Aug 29 '17 at 6:41
  • 1
    Updated with better details. WW are not killed by fire, but wights are. Viserion is a wight. There is a doubt on the fact that it produces fire or not. – Eleanore Aug 29 '17 at 6:51
  • "(possibly) Valyrian steel (not proven)" we see Jon killing one with his Valyrian sword, how "not proven"? – Federico Aug 29 '17 at 7:13
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    @Dawny33: I believe Eleanore is asking whether dragon wights can be killed using dragon-forged weapons (obsidian and/or Valyrian steel), but has considerately left that out of the title to avoid spoilers. Using “White Walkers” in the title was confusing, but wights/white walkers is confusing terminology. Blame Lost. – Paul D. Waite Aug 29 '17 at 8:46
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    @PaulD.Waite exactly, I could not put spoilers in the title, the reference is exactly to the dragon :) Never safe enough with spoilers! – Eleanore Aug 29 '17 at 9:01
5

We Don't Know

We can speculate that most wights can be killed by "dragonfire weapons" from what we've seen:

  • Human: Killed by Valyrian Steel, Dragonglass and fire.
  • Bear: Killed by Dragonglass, not clear if the fire would have killed it eventually.
  • Giant: No information yet.

From the information given it would appear that all wights can be killed by these weapons but we simply don't have enough to go on.

However, dragon fire is a common theme with these weapons and a dragon is a magical creature unlike the other wights we see. Therefore, we can't really compare "normal" wights to a dragon wight as the semantics of them are more than likely quite different. I'm sure we'll get the true answer in Season 8.

To update on this as Viserion actually appears to be a "White Flyer" according to the official script so the situation regarding him is even more complicated.

A massive chunk of the Wall breaks free ahead of Tormund. The ice dragon glides away, and we get our first clear look at him, and at the Night King on his back. He's done the same thing to Viserion that he did to Craster's sons. Only those were babies, and this is a dragon.

Game of Thrones, Season 7 Episode 7, "The Dragon and the Wolf"

  • “I'm sure we'll get the true answer in Season 8.” Assuming anyone can get near enough to the dragonwight to try it. For all we know, this could be the first dragonwight that has ever existed. – Paul D. Waite Oct 5 '17 at 11:54
  • @PaulD.Waite I agree so I suppose it depends on the ending – TheLethalCarrot Oct 6 '17 at 8:01
  • I think only Drogon and Rhagal will be able to defeat the undead dragonwight. I can't picture anyone else getting close to it's deadly blue "unfire" – m1gp0z Feb 14 at 17:22
  • @m1gp0z Thanks for the comment reminded me to update the answer, Viserion is a "White Flyer" not a wight. – TheLethalCarrot Feb 14 at 17:28
  • Cool! I didn't know this had been confirmed – m1gp0z Feb 14 at 17:31

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