Changes

This knife originally belonged to [[Ruby]] and is capable of destroying most [[demon]]s 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. When stabbed in less vital areas with the knife, the demon experiences intense agony but survives.<ref>[[4.10 Heaven and Hell]]</ref><ref name="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]]<ref name="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,<ref name="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]],<ref name="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 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>