Changes

|name= Demon-Killing Knife<br>Ruby's Knife<br>Demon Blade

|episodes= '''First Appearance:''' [[3.01 The Magnificent Seven]]<br>'''Latest Appearance:''' [[1215.05 Proverbs 17:3]]}}{{Quotation|title=|text= Because demons can't be killed by run-of-the-mill cutlery.23 All Along At the Watchtowervery least, you'd need an ancient demon-killing knife of the Kurds.|author= [[Henry Winchester]]|source= [[8.12 As Time Goes By]]

This knife originally belonged to [[Ruby]] and is capable of destroying most [[demon]]s (Albeit if the stab wound is in an immediately fatal place, such as the neck or heart. Killing demons with the knife comes at the cost of killing their human hosts at the same time unless the vessels are already dead when they are possessed.) if the stab wound is in an immediately fatal place, such as the neck or heart; when When stabbed in less vital areas with the knife, the demon experiences intense agony but survives.<ref>[[4.10 Heaven and Hell]]</ref><refname="six20">[[6.20 The Man Who Would Be King]]</ref> Its blade is inscribed with symbols and the handle is made from either wood or bone. Of all the demons that have been stabbed with the knife, only [[Knights of Hell]] such as [[Abaddon]]<ref name="eight12">[[8.12 As Time Goes By]]</ref> and [[Cain]]<refname="nine11">[[9.11 First Born]]</ref> and [[Princes of Hell]] like [[Ramiel]]<ref name="twelve12">[[12.12 Stuck in the Middle (With You)]]</ref> have been shown to be immune to its killing power. [[Alastair]]<ref name="four09">[[4.09 I Know What You Did Last Summer]]</ref><ref name="four16">[[4.16 On the Head of a Pin]]</ref> was stabbed in the left shoulder both times, although both stabs were very close to his heart. However, Dean once stabbed Alastair in the gut with it while torturing him which has been shown to kill lesser demons and only caused Alastair pain. [[Bobby]] is the only known person to survive being stabbed with the knife, having stabbed himself to kill the [[demon]] possessing him at the time,<refname="five01">[[5.01 Sympathy for the Devil]]</ref> but the knife left him paralyzed from the waist down.<ref>[[5.02 Good God, Y'All]]</ref> It also has no effect on [[angels]],<refname="four01">[[4.01 Lazarus Rising]]</ref> but it can kill [[hellhound]]s if the wounds are fatal.<ref name="eight14">[[8.14 Trial and Error]]</ref>

The knife has has been used to kill demons , humans, and hellhounds.  The white-eyed demon [[Alastair]] was never killed by the knife's demon killing power since both times he was stabbed were on the left shoulder. However, while torturing Alastair, Dean also stabbed him in the gut with the knife which caused him pain in combination with salt water, but didn't kill him despite the fact that gut wounds have been shown to be able to kill lesser demons.<ref name="four09" /><ref name="four16" /> However, [[Sam]] noted at one point that Lilith herself was scared of the knife,<ref name="four02">[[4.02 Are You There God? It's Me, Dean Winchester]]</ref> and she continually took precautions to avoid being stabbed with it whenever confronted with it.<ref name="three16">[[3.16 No Rest for the Wicked]]</ref><ref name="four18">[[4.18 The Monster at the End of This Book]]</ref>

The white-eyed demon [[AlastairCrowley]] was immune to , too, has always avoided being stabbed with the knife's killing power.<ref name="four09five20" >[[5.20 The Devil You Know]]</ref><ref name="four16six10" /> However, [[Sam6.10 Caged Heat]] noted at one point </ref> While Crowley stated that Lilith herself was scared of the knife,couldn't kill him <refname="ten22">[[410.02 Are You There God? It's Me, Dean Winchester22 The Prisoner]]</ref> and she continually took precautions , this may have been a bluff as he was later shown to avoid being stabbed with be nervous in its presence when Dean pulled it whenever confronted on him after disabling him with itan [[angel blade]].<refname="eleven02">[[311.16 No Rest for the Wicked02 Form and Void]]</ref>Dean was later able to disable Crowley for a time by impaling the knife through his hand,<refname="twelve23">[[412.18 The Monster at 23 All Along the End of This BookWatchtower]]</ref> but Crowley eventually escaped somehow like he'd escaped a similar injury from an angel blade.<ref name="eleven02" /> After freeing himself, Crowley apparently retained the hand wound as he kept the hand that was stabbed wrapped up in a bandage.<ref name="twelve23" />

CrowleyWhen [[Abaddon]] was stabbed by the blade, tooshe survives despite experiencing intense pain, has always avoided being stabbed with revealing that the knife.<ref>[[5.20 The Devil You KnowKnights of Hell]]</ref>are partially immune to its demon killing abilities.<ref>[[6.10 Caged Heat]]<name="eight12" /ref> While Crowley stated in Unlike Abaddon, [[10.22 The PrisonerCain]] that stabs himself with the knife couldn't kill him, this may have been a bluff as he was later shown to be nervous in its presence when blade after Dean pulled it on threatens him after disabling him with an [[angel blade]]and suffers no pain or even any sign of exsanguination.<ref>[[11.02 Form and Void]]<name="nine11" /ref>

After surviving a killing blow from the knife by Sam, it was revealed that [[Ramiel]] and all [[Princes of Hell]] are immune to the knife's powerand though the knife caused Ramiel some damage, he didn't bleed from the wound when he pulled out the knife like Cain.<ref>[[12.12 Stuck in the Middle (With You)]]<name="twelve12" /ref>

[[Sam]] stabs [[Alastair]] with the knife, but it appears to have narrowly missed his heart. While escaping from Alastair they lose the knife. In flashbacks, [[Ruby]] is shown taking the knife back from Sam and killing the [[demon]] with her with it and then later killing a demon after Sam fails to exorcise it. They use it in the fight when they walk into [[Lilith]]'s trap.

[[Dean]] uses the knife to torture [[Alastair]] (now using a new [[meatsuit]]) who later beats Dean unconscious after being freed from the [[Devil's trap (symbol)|devil's trap]]. [[Castiel]] arrives and throws drives the demon-killing knife into his shoulder, but it barely missed his heart. Castiel twists the knife with his powers, but Alastair manages to pull it out and lunges at the [[angel]]. [[Alastair]] attempts to send Castiel back to [[Heaven]], but is interrupted and killed by [[Sam]].

[[Dean]] tries to use the knife on the possessed [[Nora]] but the demon knocks it from his hand. Instead, Dean and [[Gary Frankel]] perform an [[exorcism]] on Nora and send the demon back to [[Hell]].

In a deleted scene, [[Guy Bee]] has said that when [[Samuel Colt]] gives [[Sam]] [[the Colt]], Sam asks him if he'll be alright unarmed and Samuel opens his draw drawer and pulls out the knife ([http://affairsmagazine.com/wordpress2/2011/07/30/meta-meme-beta-and-emo-a-chat-with-guy-bee/ Source]).

When facing the [[demon]] [[Abaddon]], [[Dean]] stabs her in the back with the knife, but while it hurts her, like with [[Alastair]] it doesn't kill her. However, the distraction allows [[Sam]], Dean and their grandfather [[Henry Winchester]] to escape.

When [[Sam]] and [[Dean]] wonder why the knife didn't work, Henry tells them that normal knives wouldn't and that they would need an "ancient demon-killing knife of the Kurds." When Dean shows him the knife, Henry is surprised and asks where they got one and Dean tells him from [[Ruby|a demon]]. Presumably Later, they discover that the knife didn't work as [[Abaddon]] is a [[Knights of Hell|Knight of Hell]] and one of the first demons ever created.

While working on [[Demon Cure|curing ]] [[Crowley]] of being a [[demon]], [[Sam]] has the knife with him. He uses it to cut himself when he performs the [[exorcism]] that will finish the job, but Dean stops him before he can put his hand over [[Crowley]]'s mouth with the blood and finish the job.

When four demons attack [[Cain]]'s house, Dean takes on three with the knife while Crowley kills the last with an [[angel blade]]. Despite an intense fight in which Dean briefly loses the knife to one of the demons, he manages to kill all three single-handedly, proving himself to Cain to be worthy of the [[Mark of Cain]]. When Cain refuses to give Dean the First Blade, Dean threatens him with the knife, but Cain merely stabs himself with it, proving to be completely immune to the knife's powers with it not even hurting him, let alone causing him to bleed.

Dean tries to use the knife against Amara, but his is stayed by her thrall. Alater Later when Sam breaks into the room and she attacks him, Dean moves after her againwith the knife, but she flings him against the walland leaves.

Dean stabs the knife through crowleyCrowley's hand into the desk in the Bunker library to restrain him, but Crowley later pulls himself loose and escapes. ===[[13.08 The Scorpion and the Frog]]===Sam arrives at [[Luther Shrike]]'s mansion under the guise of a seller who wants to offer him a knife that can kill demons. He presents Ruby's Knife to Shrike in a wooden box and claims that it is one-of-a-kind. Luther, seeing Sam's deceit, believes that he's a demon and attacks him with the knife. During the struggle, Sam stabs Luther, but the knife is ineffective as Shrike cannot die while he remains on the property. He knocks Sam out with a fossilized Gorgon tooth and takes the knife with him to go protect the safe. Upon arrival, Shrike uses the blade to kill the demon [[Grab]] before entering the room. He goes to attack Dean, but Sam distracts him and Dean punches Luther and retrieves the knife. ===[[14.01 Stranger in a Strange Land]]===When they arrive at the diner in [[Detroit]] to meet with [[Kipling]] and rescue [[Castiel]], Sam hands Ruby's knife to [[Mary]] stating that it would be better if she takes it. After Mary and [[Bobby Singer (Apocalypse World)|Bobby]] ambush the restaurant, Mary throws the knife to Sam who turns to attack Kipling. During the fight between Sam and Kipling, they struggle for control of the knife which Sam ultimately loses. As Kipling comments that the knife is "cool," Sam suddenly grabs his arm and drives the knife into his chest, killing Kipling. ===[[15.05 Proverbs 17:3]]===After seeing a resurrected [[Lilith]], Sam draws the knife, which Lilith calls a Demon Blade, while Dean draws an [[angel blade]], causing Lilith to comment that Dean upgraded. ==Trivia==* In earlier seasons, the knife is generally called "Ruby's knife" by the characters. In [[8.12 As Time Goes By]] refers to it as an "ancient demon-killing knife of the Kurds." It's referred to as just the demon-killing knife by [[Mary Winchester]] in [[14.01 Stranger in a Strange Land]]. Additionally, Dean calls it a demon blade in [[12.06 Celebrating the Life of Asa Fox]] and explains to a room full of hunters that it kills demons, "kills them dead." In [[12.15 Somewhere Between Heaven and Hell]], Dean calls it a demon knife when explaining to [[Gwen Hernandez]] how to kill a [[hellhound]]. [[Lilith]] calls it a Demon Blade upon seeing the weapon in [[15.05 Proverbs 17:3]].* Though the knife played a role as the Winchesters main demon-killing weapon in the earlier seasons, it has lost its prevalence in the later seasons, particularly after the revelation that [[angel blade]]s can also kill demons. In the later seasons, the Winchesters use angel blades to kill demons more often the knife which then typically only appears once or twice a season.* The knife was not used by the Winchesters to kill any demons in season 11, but Dean did attempt to use it against [[Amara]] twice and drew it on [[Crowley]] before deciding against killing him. It was used by [[Gunner Lawless]] to kill the [[crossroads demon]] [[Duke]] in [[11.15 Beyond the Mat]] however. This was also a season where demons were not a major enemy to the Winchesters due to the greater threat of [[the Darkness]].* Hunters unconnected to the Winchesters don't appear to be aware of the knife's existence. In [[12.06 Celebrating the Life of Asa Fox]], [[Bucky Sims]] compares the temporary effects of an [[exorcism]] to the effects of an [[angel blade]]. In the same episode, when Dean shows the knife to the other hunters gathered, they are confused, causing Dean to have to explain what it is and its purpose despite the same hunters earlier talking about the Winchesters' legendary reputation.* Throughout season 13, the Winchesters did not use the knife to kill demons at all, instead relying entirely on angel blades despite the fact that demons were a major enemy in that particular season. Though the knife appeared in [[13.08 The Scorpion and the Frog]], the only demon killed with it was [[Grab]] by [[Luther Shrike]] while Luther was unharmed when Sam stabbed him with it. The knife was once again used by Sam in [[14.01 Stranger in a Strange Land]].* In a deleted scene for [[13.08 The Scorpion and the Frog]], Luther Shrike inspects the blade, remarking it's craftsmanship looks Kurdish but is unaware of what dialect the markings come from.* Before Sam uses the knife to kill [[Kipling]] in [[14.01 Stranger in a Strange Land]], the last time either of the Winchesters used it to kill a demon was in [[12.12 Stuck in the Middle (With You)]] when Sam killed the male demon protecting [[Ramiel]].* Occasionally, demons have expressed an appreciation for the knife such as [[Alastair]] in [[4.10 Heaven and Hell]] and Kipling in [[14.01 Stranger in a Strange Land]]. In the latter case, Sam used the demon's distraction with admiring the knife to kill him with it.