|Powers||Can kill archangels|
|Episodes|| 5.19 Hammer of the Gods|
6.03 The Third Man
13.07 War of the Worlds
13.13 Devil's Bargain
You recall the important errand I had mentioned? Word had got back to me that a certain artifact I thought had been lost forever resurfaced. And now it's mine. Beautiful, isn't it? [...] The only known weapon capable of destroying an archangel -- the archangel blade.
One of the few weapons in existence with the capability to kill an archangel, but only when wielded by an archangel. Like a standard angel blade, the archangel blade is a small dagger like weapon, but differentiates with the blade being made of a golden material and having a twisting tri-blade design, with etchings engraved down each side of the blade.
While the lore indicates that only an archangel can wield it against another, the blade still proves effective against demons and presumably regular angels when used by a human.
After casting a blood spell on Gabriel to bind him to her, Kali takes what she believes to be Gabriel's blade and stabs him with it, killing him. However, this is merely a trick on Gabriel's part as he is still alive and hiding in the Impala, having given her a fake he had "made out of a can of diet orange Slice." Despite the trick, he does confirm that the blade of an archangel can kill him and Lucifer. Gabriel confronts his brother with the blade to buy Sam and Dean time to escape the Elysian Fields Hotel with Kali, but is himself killed when Lucifer turns it on him.
When Castiel and Gabriel are at the gas station and realize that a group of angels are outside, Gabriel, who was an illusion made by Metatron, brandishes his archangel blade.
Kevin explains that archangel grace is required to use a spell from the angel tablet to open an inter-dimensional rift, prompting Michael to using his archangel blade to perform a small incision on Lucifer's throat, allowing him to siphon off the majority of his grace to use in his rift opening spell.
As Ketch reports back to Asmodeus regarding his failed attempt to kill Lucifer, he fears that as good as he is, he doesn't stand a chance against the Devil at full power. Asmodeus agrees and tells Ketch that the important errand that took him away was in regards to an artifact that had resurfaced and reveals to Ketch the only known weapon that can destroy an archangel -- the archangel blade. Impressed, Ketch, however questions the weapon's usefulness reminding Asmodeus that the lore on the weapon specifies that it is only effective when wielded by an archangel. Asmodeus proceeds to lead Ketch to a jail cell and introduce him to one of his prisoners, the Archangel Gabriel.