Changes

|powers and abilities= <br>* Regeneration* [[Shapeshifting]]* Super strength, regeneration, possession, shapeshifting.|vulnerabilities= Borax, beheading and powerful spells can temporary incapacitate them. <br>* Blood of the fallen, being eaten by another Leviathan and "bibbing" can kill them.Fallen* [[Borax]]* Decapitation

Leviathans, also called the Old Ones, were primordial creatures from the sea, that through evolution, became able to possess other creatures to survive on land.<ref>[[Supernatural: The Official Companion Season 7]]</ref> Leviathans pre-date the creation of humans and [[angel]]s, as well as the [[soul]] itself. They would also pre-date any beings with souls, such as [[Alphas]]. They are therefore among the first creations of First Beasts that were created by [[God]], preceding many of his other creations.

[[Death]] describes described them as immensely powerful, hungry, clever , poisonous, and poisonous"entertaining" in his opinion. Before God went on to create more creatures, however, He felt that the Leviathans threatened to consume and destroy everything "in God's Petri dish." For this reason, Death states stated that God created [[Purgatory]] and sealed the Leviathans inside to contain them and their hunger.

When [[Castiel]] opened the door to Purgatory and took in the power of the souls stored there to increase his own angelic power, he also took in the Leviathans. With the help of [[Sam]], [[Dean]] and [[Bobby]], Castiel finally expels was able to expel the souls back to Purgatory, but some of the Leviathans "held on." Castiel's vessel is was taken over by the Leviathans, and they manage however it quickly began to deteriorate forcing the Leviathans to guide Castiel's vessel into a nearby water catchment just before the vessel disappears in imploded, creating a whirlpool, and releasing them into the water supply.

The number of Leviathans that escaped from Purgatory is unknown. The Leviathans operate within , though Dean suspected that possibly over a rigid hierarchy lead by [[Dick Roman]]hundred were in Castiel's vessel at the same time.<ref name="seven02">[[7.02 Hello, Cruel World]]</ref> The Leviathans operated within a rigid hierarchy lead by [[Dick Roman]]. Their ''modus operandi is '' was to take on the forms of humans who have valuable skills, or are were in positions that may be useful, particularly positions of power including the military and corporations. Dick Roman says stated their golden rule is was, "thereThere's no such thing as monsters." Their plan, as revealed by [[Bobby Singer]], is was to turn humanity into the perfect never-ending food-source. To accomplish this, they are were building slaughterhouses for humanity in various locations and are were putting an additive into the food that dumbs-down made humanspliable and easily controlled. It The additive would also kills kill all monsters that feed on humans such as [[vampire]]s, [[werewolves]] and [[ghouls]] and the . The Leviathans would also develop a version that they put into coffee creamer that breeds would breed out unwanted traits (naturally lean people, short people, hemophiliacs, and those with a high IQ) and kills kill people who have such traits. The Leviathan plan is also planned to build centers to cure diseases like cancer, so that their food supply will would be disease free.

[[The Word of God]] tablet on the Leviathans reveals the way to stop them:<blockquote>"Cut off the head, and the body will flounder. Waste not thy time nor your breath upon the Leviathan herd. Point thy blade at the heart of their master, for from him springs all their messages. Leviathan cannot be slain but by a bone of a righteous mortal, as light and good as the Leviathan are hungry and dark, washed in the three bloods of the fallen: a fallen angel, the ruler of fallen humanity, and the father of fallen beasts."</blockquote> Dean, Sam and Castiel use this to kill Dick Roman, and with him dead, the remaining Leviathan cease to be a significant threat. By one year after Dick's death, their influence seems to be completely gone from the world as people are shown to be back to normal and Sam and Dean are able to eat normal food without apparent worry about the food additive. Castiel and Dean, while While trapped in Purgatory, are Castiel was constantly hunted by Leviathan. They appeared suddenly as a mass of black goo that landsafter crash landing into the ground, causing a crater in the earth, and morph into human form. With the help of [[Benny Lafitte]] they defeat at least four, but Castiel later tells Sam and Dean that his last memory of Purgatory is being hunted by Leviathans.

In [[8After the death of Dick Roman, any of the remaining Leviathans still on Earth cease to be a threat.20 Pac-Man Fever]]By one year later, their influence seemed to be completely gone from the world as people were shown to be back to normal and Sam, and Dean and [[Charlie Bradbury]] bring up a Leviathan as possibly being what is killing people, indicating that there are still some Leviathans unaccounted for, although it turns out that they are not dealing with one, after allwere able to eat normal food without apparent worry about the food additive.

The Leviathans have sharp teeth within an expanding jaw, and possess a bifurcated tongue. Because of this trait, Sam and Dean often referred to them as "big mouths." As shapeshifters, Leviathans can mimic a particular human being following simple contact with one, or if they obtain any type of DNA from a person, from skin cells to strands of hair. They feed on are able to copy a human internal organs - sometimes with cheeseso perfectly they have access to that person's thoughts and feelings, and even insanity.<ref name="seven06">[[7.06 Slash Fiction]]</ref> All the Leviathans that escaped [[Purgatory]] absorbed everything that [[Castiel]] knew, as he was their original vessel. When wounded they "bleed" black goo.

They can mimic a particular prefer to feed on human being following contact internal organs – sometimes with onecheese, or if they obtain DNA from however [[Leviathan!Sam]] once related to [[Leviathan!Dean]] that had a person. They are then aware of all that person's thoughts and feelingsbrother with many issues, and even hallucinationsthat he ate him in the end – so they are not averse to cannibalism.<ref name="seven06">This is later shown when [[Dick Roman]] eats [[7.06 Slash FictionVictor]]</ref> All the Leviathans now outside and [[PurgatoryGeorge]] absorbed everything that revealing his plans to eat [[CastielJoyce Bicklebee]] knew, as he was their original vessel. When wounded they "bleed" black goowith George telling the Winchesters that a Leviathan eating another is one of the only ways to kill them.

[[Leviathan!Sam]] said that he once had a brother with many issues, and that he ate him in A severe punishment among the end - so they are not averse to cannibalismLeviathans is known as "Bibbing. This is later shown " First mentioned by Dick Roman when he told [[Dick RomanValente]] eats : "Next time, call me with a win. For your sake. Please don't make me bib you."<ref name="seven06">[[Victor7.06 Slash Fiction]] and </ref> When Dick decides that [[GeorgeDr. Gaines]] plans ' experiments are drawing too much media attention, he decides to eat [[Joyce Bicklebee]]bib him. This involves literally placing a bib on him, with George telling the Winchesters that and then Dr. Gaines eats himself until nothing is left – except a Leviathan eating another goo stained bib. This is one of the only ways to kill themknown methods of eradicating a single Leviathan for good.

"Bibbing" was first mentioned by Dick Roman when he told The [[ValenteWord of God]]tablet on the Leviathans reveals the way to stop them: <blockquote>"Next timeCut off the head, call me with a winand the body will flounder. For Waste not thy time nor your sakebreath upon the Leviathan herd. Please don't make me bib you."<ref name="seven06">[[7.06 Slash Fiction]]</ref> When Dick decides that Dr. Gaines's experiments are drawing too much media attentionPoint thy blade at the heart of their master, he decides to bib for from himsprings all their messages. This involves literally placing Leviathan cannot be slain but by a bone of a bib on himrighteous mortal, as light and good as the Leviathan are hungry and then Dr. Gaines eats himself until nothing is left - except dark, washed in the three bloods of the fallen: a goo stained bib. This is one fallen angel, the ruler of fallen humanity, and the only known methods father of eradicating a single leviathan for goodfallen beasts."</blockquote>

Dean, Sam , and Dean refer Castiel use this to them as "big mouthsfashion a weapon using the bone of a nun, and the blood of Castiel (a fallen angel), Crowley (ruler of fallen humanity), and the Alpha Vampire (father of fallen beasts)."

===Powers and Abilitiesabilities===* Can kill angels – Leviathans can kill angels by forcing their fists into the angel's chest, causing black ooze to purge the angel from the inside.* Enhanced endurance and regeneration – Leviathans are extremely resilient, surviving multiple shotgun blasts with silver buckshot or taking a shot to the head at point blank range. [[Edgar]] was able to reassemble itself after being crushed by a falling car. They can even re-attach their heads if decapitated.<ref name="seven02">[[7.02 Hello, Cruel World]]</ref><ref name="seven06">[[7.06 Slash Fiction]]</ref>* Enhanced senses – The Leviathan Edgar was able to smell Sam and Dean Winchester within the Alpha Vampire's mansion.* Flight – In [[Purgatory]] Leviathans are able to fly through the air in the form of meteors of black ooze that crash into the ground and take on a humanoid form.* High intelligence – Many of the Leviathans are known to possess vast knowledge on almost all the world's secrets, including the ability to cure cancer among other diseases. Their intelligence also allows them integrated seamlessly into society, making hunting them extremely difficult.* Immunity – They are immune to an angel's power and most weapons devised by mankind.* [[Possession - ]] – Leviathans can possess any human they come into contact with in through their fluid form, be it through physical contact or a human drinking it. This person becomes their physical embodiment of sorts. These shells bleed black ectoplasmic looking blood when injured and can reshape their jaws to display long sharp teeth and a two-pronged tongue.* [[Shapeshifting - ]] – Once a [[vessel]] is taken they can reshape it into any human form they touch. They require only a fragment of DNA to transform into a person; even lost hair will do. The creature possessing a little girl takes the form of a doctor by touching his arm. They can also absorb the memories of anyone whose form they take, much like a [[shapeshifter]]. This ability extends to absorbing a victim's mental state as well, but without requiring as evidenced when the person to remain alive[[Leviathan!Sam]] revealed he was having visions of Lucifer torturing him. It is revealed that there are certain humans like [[Charlie Bradbury]] and , Bruce Springsteen , and Eli Manning who possess a certain "spark" that means they cannot be emulated as effectivelyperfectly.* Super strength - – They are shown to possess greatly enhanced strength; at their first meeting, they are able to hurl Dean and Bobby across a room with little effort. * Healing/Endurance - Leviathans are extremely resilientpredate angels, surviving multiple shotgun blasts with silver shotdemons, including one to the head at point blank range. One also survived and reassembled itself after being crushed by a falling car. They can even re-attach their heads if decapitated.<ref name="seven02">[[7.02 Helloall other monsters, Cruel World]]</ref><ref name="seven06">[[7.06 Slash Fiction]]</ref>* Can kill angels - Episode [[7.21 Reading Is Fundamental]] shows that Leviathans can which allows them to overpower angels them easily. They are immune to an angel's power and can kill them by forcing their fists into the angel's stomach, causing the angel to then ooze black goo and die.* Flight - In [[Purgatory]] Leviathans are able to fly through the air in the form of meteors of black ooze that crash into the ground and take on a humanoid form.

* [[Borax]] – Leviathans are highly susceptible to materials that contain the chemical compound borax (sodium borate) such as household cleaning products. Contact with their skin results in an instant burning effect that can reduce them to charcoal-like husks following prolonged exposure. A Leviathan will eventually heal from the effects, though the length of time depends on the severity of exposure. [[Dick Roman]] was shown to be less susceptible to the chemical, healing nearly instantly after a borax bomb blew up in his face.<ref name="seven09">[[7.09 How to Win Friends and Influence Monsters]]</ref>* Beheading – Removing a Leviathan's head disables them temporarily. But unless the head is kept far away from the body it will re-attach itself. The combination of burning them with borax and then beheading them and separating the head and the body appears to be the easiest method of indefinite dispatchment, assuming the head has no way of finding its way back to the body or if any surviving Leviathans can locate the head as well as the rest of the remains. Head trauma can also disorient Leviathans for a few seconds, as shown when Bobby shoots Susan with one of Dick's revolvers and whacks a security guard with a nearby crowbar.<ref name="seven09">[[7.09 How to Win Friends and Influence Monsters]]</ref>* Blood of the Fallen - – The [[Tablets|Leviathan tablet]] states that a Leviathan can only be killed by a bone of a righteous mortal soaked in the blood bloods of the fallen. The bone must come from someone as light and good as the Leviathan are hungry and dark. There are three fallen whose blood is required; the first of these is a [[fallen angel]] (Castiel's blood qualifiesqualified). The other two fallen are the ruler of fallen humanity (meaning [[Crowley]], the King of Hell) and a father of fallen beasts (an [[Alpha]]). Once this weapon is assembled, the Leviathan only needs to be given a fatal blow to be killed, but it can result in those nearby being pulled to [[Purgatory]] with the Leviathan soul.* Borax - [[Clairsentience]] – After the Leviathans are highly susceptible took control of Castiel's vessel, he gained the unique ability to materials that contain the chemical compound borax (sodium borate) such as household cleaning productstell them apart no matter what form they take. Contact with their skin results in an instant burning effect that can reduce them This proves to charcoal-like husks if they are exposed be key to too much. It is suggested that they will eventually heal from identifying the effects, however. Their leader, [[real Dick Roman]], may be less susceptible after he had a group of security guards to take his form and planted them throughout SucroCorp headquarters to disorient the chemicalWinchesters.<ref name="seven09seven23">[[7.09 How to Win Friends and Influence Monsters23 Survival of the Fittest]]</ref>* Beheading - Removing a Leviathan's head disables them temporarily. But unless the head is kept far away from the body In general, it will re-attach itself. The combination of burning them with borax and then beheading them and separating the head and the body also appears to be the only way to put them down indefinitely, assuming the head has no way one of finding its way back very few ways to the body.* Witchcraft - Leviathans show susceptibility to witchcraft. It can incapacitate them temporarilyconfirm if someone is a Leviathan.* Other Leviathans - – Leviathans can be killed by another Leviathan eating them. A Leviathan can even eat ''itself'', a process referred to as "bibbing."* Rigid hierarchy - – The Leviathans rely heavily on having [[Dick Roman|one all-powerful leader]] to give them instructions and conduct their master plan. If he dies, they fall apart completely and revert to a state of disorganization.* Witchcraft – Leviathans show susceptibility to witchcraft, which can incapacitate them temporarily.

* [[Dick Roman]] (deceased) - – Leader of the Leviathans. Roman was killed after being stabbed with the bone of a righteous mortal, soaked in the bloods of the three fallen by [[Dean Winchester]].* [[Annie]] / [[Dr. Gaines]] (deceased)– Due to repeated failures in manufacturing the additive to keep humanity compliant, Dick Roman "bibs" Dr. Gaines and forces him to eat himself.* [[Edgar]] (neutralized) - – A Leviathan whose vessel works worked in demolitions. Edgar was neutralized after a confrontation with the [[Alpha Vampire]] allowed [[Sam Winchester]] to decapitate him.* Two members of the Stockville Sharks Swim Team, who later become a head nurse and a hospital administrator at Sioux Falls General.(unknown)* [[Chet]] (neutralized) - – Leviathan who works for a credit card company assigned to track down Sam and Dean Winchester. Chet was neutralized when Bobby Singer discovered the Leviathan's weakness to [[Samborax]] . He was decapitated and his head given to [[Dean WinchesterSheriff Jody Mills]]to toss over a bridge.* [[Valente]] - (unknown) – A Leviathan FBI agent.* [[Leviathan!Sam]] and [[Leviathan!Dean]] (neutralized) - – Leviathan doppelgängers of Sam and Dean Winchester. Decapitated and their bodies incinerated by the real Sam and Dean.* [[Susan]] - (unknown) – Dick Roman's assistant.* [[Joyce Bicklebee]] (neutralized) - – A Leviathan in real estate. Her head may or may not have been eaten by her assistant George.* [[George]] - (neutralized) – Joyce's assistant.* [[Pete]] - (unknown) – Charlie Bradbury's manager at [[RRE]].* [[Tarrell]] - (unknown) – The Leviathan who assumes Pete's position at RRE.* [[Victor!Leviathan|Victor]] (deceased) - – Roman's minion at RRE. Eaten by Dick Roman after Sam and Dean steal the Leviathan [[tablet]].* Approximately ten leaders of various divisions of Dick Roman's grand plan.(unknown)* Three [[SucroCorp]] guards (neutralized)– Assaulted with borax and decapitated by [[Meg]].* At least one SucroCorp scientist (neutralized)– Decapitated by Dean Winchester.* Four seen during DeanMultiple SucroCorp personnel (neutralized) – Assaulted and decapitated by Crowley's time in demons* [[Purgatory]] Leviathans (neutralized)– Four seen decapitated during Dean's time in Purgatory.

'''Unconfirmed:'''* [[Amanda Willer]]<ref name="seven11">[[7.11 Adventures in Babysitting]]</ref>

* [http://en.wikipedia.org/wiki/Fred_Savage Fred Savage]<ref>[[7.14 Plucky Pennywhistle's Magical Menagerie]]</ref>

After having revealed themselves to [[Dean]] and [[Bobby]], the Leviathans quickly realize they cannot remain inside [[Castiel]]'s [[vessel]] as it begins to rapidly burn up and are forced to leave for the time being; they promise to return and finish what they started. [[Leviathan!Castiel]] staggers out into the open and submerge themselves in a nearby municipal water source, abandoning the vessel, leaving only Castiel's bloody trenchcoat trench coat behind.

The Leviathans then disperse to take separate vessels of their own by various means of exposure to the tainted water. One takes a girl whilst she drank from a public water fountain, for example. Two of the creatures infect a pair of gym students and use them to kill and devour two other students, leading Dean to their whereabouts. The creature possessing the girl meets with another Leviathan - – [[Edgar]] - – to discuss their next move and the "boss" they take their orders from.

The girl comes up with a plan to solve their feeding problem and steals the form of a doctor - – [[Dr. Gaines]] - – at Sioux Falls Hospital. It then uses the position to acquire easy meals. Its act of cannibalism is witnessed by [[Sheriff Jody Mills]], who escapes the hospital with Bobby's help. Edgar arrives with the two gym student Leviathans, which take on the forms of members of staff. Bobby investigates one of the bodies and is confronted by the leviathan Dr. Gaines, who recognizes him from before, when it was inside Castiel.

Three weeks later, Bobby's contacts tell him that the Leviathans at the hospital - – Dr. Gaines, the head nurse and an administrator - – have disappeared. He says that other hunters are reporting similar attacks and that "they're like [[shapeshifter]]s only a lot more into eating folk. And nothing can kill 'em."

Meanwhile, two more Leviathans have taken[[Leviathan!Sam|Sam]] and [[Leviathan|!Dean|Dean's]]'s form and are going on a rampage from town to town, killing people ''en masse''. This causes the authorities to place Sam and Dean on the top most wanted list and a manhunt begins, with two FBI agents taking a particular interest. The doppelgängers succeed in luring them into a trap and Sam and Dean are arrested by the police.

[[Dean]] finds [[Dick]] in his car outside the hospital where [[Bobby]] is fighting for his life. When Dean yells that [[Dick Roman]] is there, passers-by start taking pictures with their phones. Dean challenges him to kill him there, but also points out that - – being famous - – he can't kill him without bringing attention to the Leviathans. Dick laughs, seemingly unconcerned by Dean's threats.

Before he dies, [[Chronos]] - – the God of Time, tells [[Dean]] and [[Sam]]:

In a flashback, as Dean and Castiel head for the portal out of Purgatory, two more Leviathans attack them. They initially get the upper hand, knocking Dean down and beating Castiel up, but Dean decapitates one from behind and Castiel holds the other one in place while he decapitates that one.

In the present, Castiel describes the last thing he remembers in Purgatory as endlessly being on the run from Leviathans before appearing in Illinois.

[[Victor Rogers]] mentions the past Leviathan situation as a "fiasco" and a "wake up call" saying that it showed him how vulnerable the current generation of hunters really are compared to the monsters they risk their lives fighting and killing and dying over."

[[Death]] also refers to the Leviathans as "the Old Ones" , a term used by [[H.P. Lovecraft]] in the Cthulhu mythos to describe ancient powerful alien beings who come to Earth. A race called the Old Ones also features in Stephen King's [http://en.wikipedia.org/wiki/The_Dark_Tower_(series) ''Dark Tower'' series]. In ''[[Binsfeld's Classification of Demons]]'', Leviathan is the name of Envy, one of the [[Seven Deadly Sins]].