White-eyed Demons

White-Eyed demons were a very powerful group of demons, known for being among the oldest and strongest demons in all of Hell. They were considered the generals or admirals of demons, and represented the highest plane of authority in Hell, just under the fallen archangel Lucifer himself. They were of such strength that while they couldn't kill angels with their own power, they could overpower them. They instilled great panic in other demons as almost all other demons were terrified of them.

History
Due to Lucifer's corruption by the Mark of Cain, his hatred against humanity started to grow and he began to torture Lilith, Adam's first wife, until she transformed into the first demon. Lilith eventually started to torture other deceased humans herself, transforming them into demons as well. Lucifer and Lilith were banished deep into hell for their deeds. Over the next centuries, three more white-eyed demons were created, among them Alastair, who would later became the grand-torturer of hell. Little is known about the other two white-eyed demons and their fate.

White-Eyed demons played a key role in preparing Lucifer's release, in fact Lilith's death was the final step in releasing Lucifer from his cage.As Azazel found the door to Lucifer's cage, Lucifer told him that Lilith knows how to break the seal's binding him captive. Azazel began to prepare the release of Lilith, however it took decades until she was eventually freed and took over hell since Azazel was killed by Dean with the Colt.

Alastair was given the task to break John Winchester, making him torture other deceased humans, this would also implicate the breaking of the first seal, however John was so resilient that Alastair was unable to achieve his goal. During that time Lilith established herself as the new leader of hell, as she saw a potential rival in Sam Winchester, she ordered his execution on multiple occasions. Roughly one year after she escaped hell, Lilith met Dean Winchester to take his soul into hell, shortly after Dean was killed by hellhounds. On her surprise, her White Light showed no effect on Sam and she was forced to flee as Sam tried to stab her with the Demon Killing Knife.

While Alastair tortured Dean in hell, offering him he would stop if Dean begins to torture others himself, Sam sought revenge and wanted to kill Lilith. Sam was aided by Ruby, unbeknown to him Lilith and Ruby secretly worked together. Lilith, who knew that her powers can't effect Sam and that he is Lucifer's vessel, avoided contact with him and elected to change the location if Sam was near by. As Dean was unable to endure the torture and pain any longer, he agreed to torment other humans souls. This broke the First Seal and allowed Lilith to break the others.

Characteristics
White-Eyed demons were terrifyingly powerful and they rank the highest demons in the hierarchy of Hell, just under Lucifer himself. They inspired fear in their subordinates as almost all demons were well aware of their power. They were even capable of holding their own against regular angels. So far, the only known demons of this type are Lilith and Alastair, the former of which was the very first demon to be created. Both Lilith and Alastair were well known for their cruelty, torturing their enemies and victims before killing them. Especially Alastair had an affinity for torture, he was basically the grand-torturer of hell, researching new ways to torture deceased humans and increase their pain. Alastair even preferred to reside in hell, as it's more suited as a place to research on torture. While Azazel set up and prepared everything for Lucifer's rise, it was mainly on Lilith to execute it by breaking the seals, however she had not such a religious connection to Lucifer like Alastair. As Lilith learned that she would eventually die shortly before Lucifer's rise, she tried to make a deal with Sam, letting "Lucifer rot in his cage" in exchange for Sam's and Dean's life.

Appearance
It is unknown how a white-eyed demon's true form looked like, however as they walked the earth, they manifested as a cloud of black smoke. As they possesed human vessels, it came to no noticeable change besides that their eye color changed to white. Shortly before Dean's soul was supposed to go to hell, he was able to see Lilith's true face and describes it as horrible.

Powers and abilities
White-Eyed Demons were some of the oldest demons and thus among the most powerful to appear in the series. They out-ranked even Azazel in the hierarchy of Hell, with only Lucifer himself as their superior. They are overall superior to Knights of Hell in terms of power and strength, but inferior in terms of their weaknesses, since Knights of Hell can only be killed by something empowered by The Darkness. Lilith as well as Alastair were rather unafraid as they faced regular angels, Castiel was unable to smite Alastair and could not withstand against him. Despite their superiority against regular angels, they knew how tremendous powerful archangels are and prefered to flee when confronted by one of them since they wouldn't stand a chance against them.


 * Biokinesis - Alastair directed a psychic attack on Sam and Dean simultaneously by raising his hand at them; causing them to grip their chests and fall down, implying that he was attacking their hearts, or lungs.
 * Possession - White-Eyed Demons can possess humans as vessels voluntarily or involuntarily, which allows them to manifest on Earth. Unlike most other demons, who usually enter and exit humans' bodies in a rush of black smoke as the humans scream, White-Eyed Demons apparently can also do this without humans noticing.
 * Advanced telekinesis - White-Eyed Demons had the ability to move objects with their mind. Lilith broke a grown man's neck with a click of her fingers without touching it, and later used telekinesis to fling Sam and Dean across the room, holding Sam immobilized to a wall at the same time she did the same to Dean to a table. Alastair used hand gestures to drag and throw people over large distances without physically touching them. During his first appearance, he also blasted apart a door without noticeable use of gestures.
 * White Light - Although only demonstrated by Lilith, by raising their hands, White-Eyed Demons can generate blast rays of blinding white light from usually their vessel's hand palms that apparently destroys just about anything they want it to. For example, Lilith blew apart an entire police station without killing the people inside, and later performed the reverse by concentrating it solely on Sam so that it did not affect the house she was in at the time.
 * Localization - White-Eyed Demons can localize any human not protected by hex-bags. Shortly after Sam destroyed his and Dean's hex bags, Lilith appeared.
 * Immunity - White-Eyed Demons couldn't be killed by smiting from a lower-level angel, showed immunity to iron and were able to enter and walk on hallowed ground. Furthermore, they were not vulnerable to holy water. Alastair was also extremely resistant to Ruby's Knife as it only caused him mild pain rather than the agony most Demons feel, and it was not deadly to him when stabbed in the stomach and upper chest. Lilith proved to be the most resilient to Sam's demonic powers of all the demons he used them on, even with him at the peak of his power and her powers useless against him. After he had grown strong enough to incapacitate and kill Alastair with them, his powers merely stirred Lilith's hair. When he finally succeeded in "Lucifer Rising", it required (in addition to all the blood he already had) all the blood of one demon, more blood from another, immense effort from him, and Lilith intentionally provoking him to anger, nearly transforming him into a monster in the process. The effort of killing Lilith also exhausted Sam's powers completely.
 * Super strength - As the first demons, White-Eyed Demons are incredibly strong, more so than humans, ghosts, monsters, reapers, lower level demons and even regular angels. While they can't kill angels using their own power, they can overpower them. Even while possessing the body of a little girl, Lilith slaughtered grown men with her bare hands. When Lilith got involved in a physical struggle with Sam, she quickly overpowered him, despite his having the advantage of position (she was lying down beneath him) and weight (his body was much larger and muscled than her vessel). Alastair lifted and strangled Dean with one hand without any signs of strain. He also lifted Castiel and placed him on a hook while they were both in vessels despite being weakened by hours of torture. Even without a vessel, he was strong enough to overpower and capture a Reaper.
 * Invulnerability - White-Eyed Demons cannot be harmed or killed by conventional means. Alastair withstood would-be fatal injuries such as numerous stabbings and prolonged torture with little reaction.
 * Flight - In their disembodied smoke state, they were able to fly.
 * Teleportation - As the oldest demons, White-Eyed Demons can instantaneously disappear and reappear anywhere from one place to another instantly at will, including travel between Hell and Earth.
 * Immortality - White-Eyed Demons had the potential to live forever indefinitely. Lilith was the very first and eldest demon, predating the Knights of Hell and even Cain himself. Lilith was tens of thousands of years old. Although his exact age was not revealed, Alastair considered Ruby, who was over seven hundred years old, to be a young demon.
 * Supernatural Perception - White-Eyed Demons could perceive beings that are invisible to humans such as ghosts, demons and reapers.
 * Super stamina - White-Eyed Demons didn't require food, sleep, water or air to sustain themself. They had an incredibly high pain threshold, withstanding hours of extreme torture from Castiel, Uriel, and later Dean (his own pupil in torturing) without giving up any information. When he got free, he showed no signs of weakness or exhaustion despite multiple injuries to his vessel.
 * Thermokinesis - White-Eyed Demons could emit extreme heat through their host's body. Lilith could control the intensity of this power as in one instance she was able to scald Sam's lips as she forcefully kissed him and in another instance she was able to burn through a Devil's Trap by merely touching it.
 * Spell Casting - As white-eyed demons were among the first demons in existence, they knew a wide variety of spells. Lilith used spells and rituals to break the 66 Seals, Alastair even knew an old and powerful spell that allowed to expell an angel from his vessel.
 * Torturing - Both Lilith and Alastair were especially skilled torturers. Alastair was the chief- torturer of hell and even managed to break Dean Winchester, as he agreed to torture others.

Weaknesses
White-eyed Demons had very few true weaknesses and were immune to most of the standard demonic weaknesses.

Harming, Misleading or Trapping

 * Holy Water - Although highly resilient to it, it still caused them pain. However, holy water was not enough to stop or seriously bother them.
 * Salt - Although resilient to, it still caused them pain.
 * Hex Bag - Like all demons, White-Eyed Demons couldn't locate someone if they are concealed by hex bags.
 * Heavenly Host - Multiple Angels acting collectively could capture White-Eyed Demons in a special unrevealed manner.
 * Devil's Trap - Like all demons, White-Eyed Demons had the standard demonic weaknesses to devil’s traps and were rendered powerless within a devil's trap. However, Alastair’s resilience and endurance remain present. Lilith stopped short of the devil's trap Sam had set up to catch her and made a point of breaking it, implying that she would have been susceptible to it had it stayed intact.
 * Demon-killing knife - Compared to other demons, White-Eyed Demons were extremely resistant to the Knife, since it did not cause Alastair as much pain as it did other demons, and it was not deadly when stabbed in the stomach or upper chest.

Banishing and Killing

 * Sam Winchester - Despite showing an impressive amount of immunity to them at first, White-Eyed Demons can become vulnerable to Sam's powers. Lilith eventually became vulnerable to Sam's powers. He telekinetically threw, immobilized, and eventually killed her in a manner that she evidently found excruciatingly painful. Although initially immune, Alastair was later surpassed and killed by Sam, after consuming a large amount of demon blood and training further with his psychic abilities. Sam was also able to use his abilities to torture Alastair and break his will in seconds, something the angels and even Dean failed to do within hours.
 * Higher-Tier Entities - Archangels could effectively destroy White-Eyed Demons. When Raphael began descending upon Lilith to protect Chuck, she elected to flee. It was implied, that Leviathans could destroy them as well. However, regular angels are unable to smite, or even defeat them. Even the projection of Anna's true form merely obliterated Alastair’s vessel, but did not cause fatal damage to the demon himself. God, Death and The Darkness could effortlessly kill any white-eyed demon.
 * Death's Scythe - As this weapon was capable of killing almost all beings, even Death itself, this weapon could kill White-Eyed Demons.
 * The First Blade - As the First Blade could kill any being, it could kill White-Eyed Demons.
 * Angel Blade - As angel blade can kill almost all demons, it can even kill White-Eyed demons.
 * Demon Bomb - Demon bombs can destroy any demons, except Knights of Hell who dispute being only black eyed demons had special resistances.
 * Demon Curing Ritual - They can be cured by this ritual.

Appearances

 * Season 2
 * All Hell Breaks Loose - Part 2 (Lilith as demon smoke)


 * Season 3
 * Jus In Bello
 * No Rest for the Wicked


 * Season 4
 * Yellow Fever (Lilith as a hallucination)
 * I Know What You Did Last Summer
 * Heaven and Hell
 * Death Takes a Holiday
 * On the Head of a Pin
 * When The Levee Breaks
 * The Monster at the End of This Book
 * Lucifer Rising


 * Season 5
 * Sympathy for the Devil

Trivia

 * Despite Cain is far more powerful than Lilith, he allowed her to run hell, since he was retired.
 * Lilith was the first White-Eyed demon introduced, sharing her eye color with Alastair. She was also the first female Big Bad.
 * Two more unknown White-Eyed Demons were mentioned in Bobby Singer's Guide to Hunting.