Ruby's Knife

Demon-Killing Knife

Demon Blade Season(s) 3-15 Manufacturer The Kurds Use Harming/killing demonic entities Powers Killing most Demons

Killing Hellhounds

Harming Horsemen

Harming Rugaru Location/Status With the Winchesters

“ Because demons can't be killed by run-of-the-mill cutlery. At the very least, you'd need an ancient demon-killing knife of the Kurds. ” — Henry Winchester to Dean Winchester

in As Time Goes By

The Demon-Killing Knife, or most commonly known as Ruby's Knife, is an ancient knife that was created by the Kurds which possesses the power to permanently kill most demons, hellhounds, and other demonic entities. Though it somehow came into the possession of Ruby, it eventually passes onto Sam and Dean Winchester, who uses it as their one of their common means of killing demons besides angel blades.

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Physical Appearance Edit

At first glance, the knife appears to be an ordinary hunting knife with a curved, serrated-edged blade and antler handle (probably from some kind of deer). However, upon closer inspection, symbols can be seen engraved along the blade.

Powers and Abilities Edit

This knife is capable of killing all but very powerful demons with a single stab to a vital area, such as the chest or the neck of the demons' vessels. As with the Colt, those killed by the knife briefly glow with orange light, which flickers out as the demon dies. Even non-lethal cuts are excruciatingly painful for almost all demons in the same way that non-lethal cuts from angel blades are to angels.

The knife is also capable of harming the Horsemen War and Pestilence; it was used to cut their fingers off in the episodes they appeared in. It is also capable of killing hellhounds. However, it is not capable of killing angels - aside from the damage to his vessel, Castiel was unaffected by the knife when Dean stabbed him during their first encounter.[1] Its effect on other supernatural creatures are largely unknown, as it has almost never been used against anything else aside from a Rugaru in Purgatory.[2]

Immunity Edit

The only subset of demons known to be immune to the demon-killing knife, are the Knights of Hell[3] and Princes of Hell.[4] White-eyed demons may be immune to it as well seeing how it was unable to kill Alastair and was never tested against Lilith however it has never been confirmed that Lilith herself was immune to it. Alastair could withstand several stabs from the Knife and found contact with it extremely discomforting rather than agonizing. However, the knife was capable of inflicting pain on the last surviving Knight, Abaddon; in fact, it was even able to temporarily incapacitate her for a few moments. It is unknown whether their resistance is permanent. [5] Even the first demon Lucifer created, Lilith, was said to be wary of it. Cain was the only one shown to be completely immune to the knife. Sam Winchester has implied that Samhain is too powerful for Ruby's knife to have the strength to kill the origin of Halloween, but Samhain seemed to refuse to face the knife directly in a fight. The Father of Murder did not flinch, wince, or show any pain at all when he stabbed himself in the heart with it. Dean's susceptibility to the knife was never tested, as while threatened with it, it was never used on him, though his complete lack of fear of it implies that, like Cain, it would be useless against him. Compared to Cain, the knife was able to harm Ramiel; in fact, the knife was unable to kill and injure the Prince of Hell, but like Alastair, Ramiel sprayed sparks out of the wound.

Creatures Affected By The Demon-Killing Knife Edit

Demons - Most demons with the exception of the Knights of Hell and Princes of Hell can be killed with the knife if stabbed in a lethal area. The White-eyed Demon Alastair proved to be durable to knife's demon-killing power. Sam Winchester believed that the knife could not kill Samhain.

Hellhounds - Hellhounds can be killed with the knife.

Horsemen - The knife cannot kill Horsemen but can harm them as shown when it was used to remove their rings.

Rugaru - Rugaru can be killed with the knife as shown when Dean killed one with it in Purgatory.

Known Users Edit

Names Edit

Trivia Edit

Appearances Edit