Angel Blades

Angel Blades were weapons carried by most angels. They were long, silver, triple-edged daggers (cross section of the blade would be a three pointed star) that can be used to kill angels, Nephilim, hellhounds, demons, and possibly other supernatural creatures. However angel blades were not capable of killing an archangel. When an angel blade was used to kill an angel, intense light exploded from the vessel, leaving the body withered. This weapon was considerably powerful as it was one of the few weapons that could kill angels and reapers, making them one of the most powerful weapons in existence.

Overview
Despite Uriel's claim that only angels could kill other angels, other beings had been able to successfully use these blades against angels at times. Dean used one to kill Zachariah, but needed to trick him in order to get close enough to do it. Sam failed in the same task earlier with a different blade. Dean later tried to kill Raphael with one, but he caught the blade. After Castiel absorbed all the power of the souls of Purgatory, Sam tried to kill him with one, but it was to no avail because, as Castiel stated, he was "not an angel anymore." Dean was later able to kill an angel with one of these blades to save Gadreel, but did so by stabbing the angel through the back.

Even demons, such as Meg, made use of these weapons. Meg used an angel blade to kill a pack of Crowley's hellhounds, and in a later episode, used one to kill the angel Hester to protect Castiel. Crowley somehow acquired one and used it to torture Samandriel, without killing him. He later threatend Castiel with it, but never gets to use it on him. In Torn and Frayed, it was shown for the first time that angel blades could, in fact, kill demons, when Sam killed two with one of these blades. In Goodbye Stranger, three demons were killed with angel blades, and Meg used an angel blade to stab Crowley in the arm, which caused him pain, but did not kill him. Meg was then killed by Crowley with an angel blade. Dean later stabbed Crowley through the hand with an angel blade, causing him great pain and pinning his hand to a wall. However, he was able to quickly free himself of the blade while Dean was away without even pulling it from the wall. It was also shown that the blades can kill Reapers in Taxi Driver, and that they could kill Nephilim in Clip Show.

According to Castiel in Good Intentions, angel blades are "touched by God."

Immunity
The only type of Angels immune to angel blades were Archangels, as many melted down bullets barely affected Lucifer, and he survived being stabbed by Castiel. The Prince of Hell Ramiel was also shown to be immune to angel blades, as he survived being stabbed in the back with one by Mary Winchester.

Castiel briefly gained immunity to angel blades when he absorbed 30-40 million souls from Purgatory, surviving a back stab by Sam Winchester. He lost this immunity after he returned the souls.

While the Nephilim Jane was killed by being stabbed through the throat with an angel blade, Jack, as the son of an Archangel and a human rather than the child of a regular angel, was unharmed when stabbed through the heart with one.

While usually immune to the effects of an angel blade, Lucifer appeared to have lost some of this immunity in his currently weakened state. When Castiel stabbed him outside of the Needham Asylum, it caused Lucifer obvious pain and his glowing red eyes flickered a few times before going out. However, he suffered no lasting or serious harm.

Angel Swords
An angel sword was a sword version of the angel blade. It presumably had the same properties as an angel blade and was carried by the Grigori who had their names inscribed upon the hilt. After killing Tamiel, one of these fell into the hands of Claire Novak.

Other Uses
An angel blade could be melted and the pieces fashioned into bullets which were just as fatal to angels. Crowley pioneered this method in The Great Escapist. He used it to great effect to kill or send angels, including Naomi, fleeing, other users were the humans of a alternate universe. Like a regular angel blade, fatality of the bullets depended on the manner of use. To create fatal damage, the bullets had to target vital organs. Bullets fired from a gun could also be reused as Castiel was able to kill Ion by manually shoving one of the bullets into his eye.

An angel blade could also remove an angel's grace as shown by Metatron using it to steal Castiel's grace by slicing open his throat, Castiel stealing Theo's grace and Crowley Adina's. In an ironic twist of fate, Castiel later uses it to remove Metatron's grace from him. Castiel was later able to use an angel blade to open Lucifer's throat and continuously drain his grace in order to power a ritual.

Known Users

 * Castiel
 * Sam Winchester
 * Dean Winchester
 * Uriel
 * Anna Milton
 * Mary Winchester
 * Gabriel
 * Raphael
 * Raphael's Spy
 * Balthazar
 * Rachel
 * Hester
 * Meg
 * Crowley
 * Metatron
 * Ion
 * Naomi
 * Hael
 * Rogue Angel
 * Farmer Angel
 * Pharmacist Angel
 * April Kelly
 * Glee Club Angel
 * Malachi
 * Theo
 * Thaddeus
 * Gadreel
 * Abaddon
 * Bartholomew
 * George
 * Hannah
 * Shaylene Johnson
 * Tamiel (Angel Sword)
 * Claire Novak (Angel Sword)
 * Trucker Cupid
 * Asa Fox
 * Benjamin
 * Mirabel
 * Ishim
 * Lily Sunder
 * Eileen Leahy
 * Lucifer
 * Rowena MacLeod
 * Arthur Ketch
 * Bar Attackers
 * Kaia's Abductors
 * Shipyard Attackers
 * Dipper
 * Castiel and Lucifer's Attackers

Appearances

 * Season 4
 * On The Head Of A Pin
 * Season 5
 * Sympathy for the Devil
 * The Song Remains the Same
 * Point of No Return
 * Hammer of the Gods
 * Season 6
 * The Third Man
 * Caged Heat
 * Frontierland
 * The Man Who Knew Too Much
 * Season 7
 * Reading Is Fundamental
 * Season 8
 * A Little Slice of Kevin
 * Torn and Frayed
 * Goodbye Stranger
 * Taxi Driver
 * The Great Escapist
 * Clip Show
 * Sacrifice
 * Season 9
 * I Think I'm Gonna Like It Here
 * Devil May Care
 * I'm No Angel
 * Heaven Can't Wait
 * Holy Terror
 * Road Trip
 * First Born
 * Captives
 * Blade Runners
 * Meta Fiction
 * King of the Damned
 * Stairway to Heaven
 * Do You Believe In Miracles?
 * Season 10
 * Black
 * Soul Survivor
 * The Hunter Games
 * Inside Man
 * Book of the Damned
 * Angel Heart
 * Season 11
 * Out of the Darkness, Into the Fire
 * The Bad Seed
 * O Brother, Where Art Thou?
 * The Devil in the Details
 * Don't You Forget About Me
 * Season 12
 * Keep Calm and Carry On
 * Celebrating The Life Of Asa Fox
 * First Blood
 * Lily Sunder Has Some Regrets
 * Stuck in the Middle (With You)
 * Somewhere Between Heaven and Hell
 * The British Invasion
 * The Future
 * All Along the Watchtower
 * Season 13
 * Lost & Found
 * The Rising Son
 * War of the Worlds
 * The Bad Place
 * Wayward Sisters
 * Various & Sundry Villains
 * Devil's Bargain
 * Good Intentions
 * Bring 'em Back Alive
 * Funeralia
 * Beat the Devil
 * Exodus

Trivia

 * Despite initial claims that an angel could only be killed by another angel, it had been shown that anyone who wielded an angel blade could kill one. It could be inferred that the statement meant that because only angels naturally had access to angel blades, that they are the only ones who could kill other angels.
 * Demons that were stabbed with the blade died with the same glow as when they were stabbed with the Demon-Killing Knife.
 * It was revealed in I'm No Angel that when an angel died after being stabbed with this blade, it caused all of their vessels' insides to be vaporized, presumably from their grace exploding.
 * The official episode summary named the blade as Sword of Lucifer.
 * Dean killed two angels and two Reapers with an angel blade and several demons. For most of the series, Sam only used an angel blade to kill demons until he killed Miriam in Lost & Found.
 * Mary Winchester was the first one in the Winchester family to use an angel blade. She used it in an attempt to kill Anna Milton but did not succeed. She was later able to successfully use it to kill Ms. Watt.
 * Despite the Winchesters originally being the only hunters to have access to these weapons, both Asa Fox and Eileen Leahy were able to somehow get one. Upon seeing that Asa had one in Celebrating The Life Of Asa Fox, the Winchesters commented that it meant he was a real hunter.
 * Jensen Ackles said that an angel blade was his favorite prop and compared them to fidget spinners.
 * In Lost & Found, when Conrad was banished by Sam Winchester, his angel blade was left behind. Once Conrad was gone, the angel blade dropped out of midair to the ground. This effect of the banishing sigil was never seen before that.
 * In The Rising Son, Dean flung an angel blade like a throwing knife to kill Harrington and save the life of Donatello Redfield. Dean's throw left Sam and Donatello highly impressed.
 * When Mary Winchester wields an angel blade, she tends to use a two-handed grip when stabbing her enemies as seen when she killed Ms. Watt and one of Arthur and Charlie's Captors. In contrast, Sam and Dean generally use angel blade one-handed though Sam used the same two-handed maneuver Mary used on Ms. Watt on Sierra.