Demon-killing knife
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Historical information
Creator : The Kurds
Use(s) : Kills and destroys demons
Users : Alastair
Bobby Singer
Christian Campbell
Dean Winchester
Sam Winchester
Affected creatures : Antichrists
Production information
The demon-killing knife is an ancient supernatural dagger of the Kurds which has the ability to kill demons. It was originally owned by Ruby before passing into the Winchesters' possession, and the team afterwards used it as their most common means of fighting and killing demons. It was implied by Henry Winchester that there may be, or at least have been, other demon knives of the Kurds like it.


When a demon is stabbed with the demon-killing knife in a vital area of their vessel such as the torso, head or neck, the demon inside the vessel will be destroyed almost instantly. (The Magnificent Seven onwards) However, if the demon the knife is used on non-vital areas, only receives a non-fatal wound such as a shallow cut or a stab to a non-vital part of its vessel such as the leg, then the knife's effect will not kill the demon, but it will still cause the demon excruciating pain. (It's the Great Pumpkin, Sam Winchester onwards)

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Dean successfully kills a demon with the knife. (No Rest for the Wicked)

Though the demon's vessel almost always dies with the demon possessing it when the demon is killed with the knife, this is apparently due to the fatal injury inflicted by the knife rather than the knife's supernatural power against demons; as when Bobby Singer stabbed himself with the knife while under demonic possession, the demon inside him was instantly destroyed while Bobby ultimately survived the stab. (Sympathy for the Devil)

The demon-killing knife is capable of killing almost any demon stabbed with it, except for certain high-level demons. Abaddon, a Knight of Hell, was only momentarily pained and wounded by the demon knife's effect before fully recovering, (As Time Goes By) while Cain was completely unaffected by the knife. (First Born) Alastair was able to survive direct stabs to the chest with the demon knife, only suffering pain and disorientation from the knife; although unlike in Knights of Hell's case, it was at one point implied that Alastair was only more resistant against the knife than lesser demons, and could have died if it went in deep enough and hit his heart precisely. (On the Head of a Pin)

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The demon-killing knife proves ineffective on angels such as Castiel. (Lazarus Rising)

As well as killing demons, the demon knife is apparently also capable of killing hellhounds. (Caged Heat, Trial and Error) It has also been implied that the demon knife can kill an Antichrist. (I Believe the Children Are Our Future) However, the demon-killing knife is not capable of killing or even wounding angels, having no effect at all on angels stabbed with it. (Lazarus Rising) Though incapable of killing the Four Horsemen of the Apocalypse, the demon-killing knife can still be used to cut off their human forms' body parts such as fingers, although it is unknown if a conventional, non-supernatural knife would have sufficed for this as well. (Good God, Y'All!, The Devil You Know)

While it is only known to kill demonic beings, the demon-killing knife is implied to still be very powerful and/or valuable; Alastair displayed fascination with the knife and noted from his use of it in torturing Ruby that it was "an exquisite piece," (Heaven and Hell) and War likewise commented that it was a "sweet little knife" when he saw Sam and Dean draw it against him. (Good God, Y'All!) On the other hand though, Henry Winchester implied that the demon knife was the very least powerful means of killing a demon. (As Time Goes By)


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The demon knife fails to kill Alastair. (On the Head of a Pin)

The demon-killing knife was apparently created by the Kurdish people in ancient times. (As Time Goes By) Little else is known about the knife's past, but by 2007, it was in the possession of the demon Ruby. (The Magnificent Seven) It remained in Ruby's possession for the following year, until the Winchesters took it in 2008. (No Rest for the Wicked, Season 4) From late 2008 onwards, after his resurrection from Hell, Dean Winchester had ownership of the demon-killing knife, which the Winchesters often used against demons to kill and/or interrogate them. (Season 4 onwards)


See here