Jack Kline

> **Diana**:"All part of being alive Jack, is to spite your family"
>  **Jack**:"Is that why Lucifer had me? To spite his family?"
>
> Diana Winchester to Jack

* Human
* Nephilim

**Jack Kline** is the son of Lucifer and Kelly Kline. He is the first and only known Nephilim to be sired by an Archangel. He is the adoptive son of the Seraphim, Castiel, and the ward/godson of Diana Winchester. He is also a hunter, and friend of the Tlanta Family. He was taken in by Sam and Dean Winchester, in order to harness his powers, before he invoked his power, to resurrect the formerly dead Castiel, whom he had claimed at his father, opposed to Lucifer.

Jack is a member of the **Kline Family,** the **Winchester Family,** and his father's **Primordial Family.**

## Personality

While still in his mother's womb, Jack was shown to be aware of his surroundings. He actively chose Castiel as his new protector and guide, replacing Dagon and even going so far as to help Castiel kill Dagon, and since his father is Lucifer, it is a general assumption that Jack is the embodiment of pure evil. This belief was originally shared even by his mother, who attempted suicide so that her child wouldn't be unleashed upon the world. Jack resurrected her, however, saving himself in the process. Kelly then became convinced that Jack could be good, and that the world needed him. Eventually, after the child helped him defeat Dagon, Castiel also became hopeful that Jack was good, and could make the world a better place. He even claimed to have been shown a vision of a future without pain, fear, or suffering.

Upon delivery, the baby rapidly aged and left his dead mother on her bed while he retreated to his nursery. When Sam discovers him, Jack was an adult and smiled menacingly at the hunter. Immediately after being born, Jack began searching for Castiel, who he saw as his father, and showed great confusion at the world around him. All that he appeared to know was that his mother was in Heaven and his *father* was supposed to be waiting for him, but nothing beyond that. While Jack possessed memories from while he was in the womb, he didn't appear to understand what they meant. Jack was shown to enjoy some simple pleasures such as eating junk food, using his powers to get them some more. Jack has taken to using the computer more often after Sam showed him how to use it and mostly watches videos or plays games, even after being traumatized by Dean's extensive porn collection.

After accidentally killing someone, Jack showed great devastation and remorse for his actions and left the Winchesters and Castiel because he was afraid that if he stayed, he would eventually hurt them. This act also motivated him to go out on his own and master some of his powers to prove he is good.

Jack was shown to see Castiel as his father instead of Lucifer, due to what Kelly had told him about Castiel. After Castiel was resurrected and Jack met him, he was very to excited to see him and hugged his uncle. He also declared that he only sees the Winchesters and Castiel as his family and states that his biological father Lucifer as well as the angels, his other uncles and aunts, were nothing to him due to their ways. He also got along with his uncle Gabriel who was not a hostile angel like the others he met and even considered Gabriel's remarks on Lucifer. When he met his grandfather, he was shocked to see him but surprised at his desire for the Winchesters to kill him before he carried out the deed himself. He got along with his great aunt The Darkness, despite knowing that he would inevitably kill her. One of his favorite people had to be his godmother, Diana Winchester, who could sense his hurt with her magic, and would remove him from a difficult situation, in order to comfort him.

While originally not caring about Lucifer at all, Jack, despite being wary of him, decided to hear Lucifer out, and Jack became fascinated by the things Lucifer told him and even came to call Lucifer "my father" despite previously claiming that Lucifer meant absolutely nothing to him. He seemed to have taken a much better view of his father after learning he fought against Michael to protect him, looking saddened as he contemplated the fact that Lucifer was probably dead and he seemingly sacrificed himself to protect Jack. While enamored by Lucifer's words and the idea of a father-son relationship with him, Jack came to see the truth about Lucifer upon discovering he killed Jack's friend Maggie, he rejected his father completely in favor of the Winchesters who Jack saw as his true family, not showing anything towards Lucifer except anger and contempt in the process. Despite this, however, somewhat similar to when Lucifer appeared shocked and even somewhat concerned as Jack is about to kill himself (showing his father still took little joy in his son's suffering despite having been disowned and having been more than willing to create another child after such rejection), when Lucifer died, Jack, while showing no signs of empathy for Lucifer's death, did not celebrate it as the Winchester's (who had held a grudge against him for years) did, looking not as glad about it as they were, but showed to be at least relieved and glad that Lucifer's plan to destroy the Universe had been stopped.

Jack has shown a capacity for self-sacrifice. When Lucifer ordered Sam and Jack to fight to the death with the victor surviving, Jack rejected Sam's offer to kill Sam and live and the idea that he could defeat Lucifer and regain his powers. Instead, Jack, without hesitation, attempted to sacrifice himself in an act of suicide so that Sam could live on and continue the fight with his planned last words being to tell Sam that he loves everyone. He was only stopped when Dean unexpectedly arrived to fight Lucifer.

Because he mostly relied on his powers for everything, Jack felt lost in the weeks after losing them. Slowly, Jack began to feel insignificant because of the threat of Michael loose on the world and himself not being able to do anything to stop it. Jack's sense of being useless also became more significant when he struggled with trying to adapt to fight like a human until his powers return and felt completely useless when he failed in adjusting to it and was unable to help in the mission to save Castiel, which led him overpowered by the demons holding Castiel prisoner. This view of himself seemed to have faded away after he managed to save Lora, a girl who had her life taken by a witch who had been stealing her life force and he seemed to feel better about himself.

By the time of Dean's return from his possession by Michael, Jack saw the Winchesters and Castiel as his fathers and vice versa. Despite their rocky start, Jack became particularly close with Dean who taught Jack how to drive on the Impala when he was dying and Jack choosing to do fishing with Dean because he knew it was an activity that Dean had enjoyed doing with his own father. Dean's opinion of Jack was always shown to matter quite a lot to him with Dean's initial impression of Jack as a monster sticking with him even after the two became close, though Dean grew to regret this opinion. Even when furious with Jack over killing his mother, Dean ultimately couldn't bring himself to kill Jack despite Jack accepting and welcoming his fate. God considered Dean killing Jack to be a father killing his son, showing the depth of the relationship Jack and Dean had developed.

Because of Jack's desire to protect his loved ones, he can show a ruthless side to himself at times. This was seen when he threatened the Prince of Hell Asmodeus for trying to hurt Sam, Dean, and Donatello Redfield. He also blasted away the shapeshifter Buddy when he tried to kill Sam, protected Dean from angels, and killed Alternate Zachariah to save Mary. When alerted of the danger by Sam, Jack returned to the bunker and attacked Alternate Michael for his assault on his family and showed him no mercy as he prepared to act on his promise to kill him. He later acted upon this promise with no hesitation when he used the power of his soul to kill Michael and use the archangel's grace to restore his own powers, despite the risks of burning off more of his soul.

After burning off a large portion of his soul while killing Michael, Jack is shown to be quieter and more reserved then he once was, most likely due to whatever degree of soullessness he is now suffering from. Though not uncaring, he has stated he feels different then he did, though he is shown still to care for the Winchesters and Castiel, as well as others, and since regaining his power, Jack's old personality of showing them off returns and when hanging out with teenagers, he couldn't help but show off. However, when he accidentally stabs a girl, his sense of guilt returned and he didn't want to have cause another fatality and immediately heals her. He was distraught that his actions caused the teens to become scared of him and his powers. At the bunker, he withholds the event from the Winchesters since he knew they would be disappointed in him and understood their secret wariness of him.

It is eventually revealed that Jack's soul really is gone since killing Michael and he has lost much of his morals as a result. Jack brutally killed Nick for trying to resurrect Lucifer, instead of doing it in a more painless way and in a moment of anger, lost control and accidentally killed Mary Winchester. Though Jack tried to correct his mistake by bringing Mary back, his hallucinations of Lucifer said that his guilt was merely a reflex left over from when he did possess a soul. As a result, Jack's subconscious manifested a hallucination of Lucifer to act as sort of his voice of reason, and after getting locked in the Ma'lak Box, Jack was distressed to be betrayed, but still couldn't bring himself to seriously harm or kill the Winchesters and Castiel. After seeing the effects of his making the whole world tell the truth and scaring his grandmother, Jack came to the belief that he truly was the monster Dean first saw him as since every time Jack tried to do good, even without his soul, he caused more harm in the process. As a result, when Dean tried to kill him, Jack accepted and even welcomed his fate, caring enough to want to cause no more harm even when he had no soul and admitted that he could no longer feel emotion such as love.

Following his second resurrection, Jack displays much of his original personality, though he still remains soulless. After seeing the plight of Kaia Nieves, Jack became determined to rescue her even though it put himself at risk. Jack later told Castiel that he remembered what it was like to feel things and it bothered him that he couldn't, that he could only remember and understand why he had felt such things. He also understood why the Winchesters were angry over Mary's death, but couldn't feel anything about it, and following the restoration of his soul, Jack immediately burst into tears. Having regained his ability to feel, Jack felt immediate remorse for Mary's death and his role in it and begged for forgiveness. Jack later tells Castiel that he's convinced the Winchesters will only ever forgive him when Jack sacrifices himself to destroy God and the Darkness. As more time passes, Jack is shown to regain his old personality from before losing his soul, though he is somewhat more reserved due to the heavy burden left upon him. As before, Jack is shown to become easily excited by things such as Dean's idea of how to break through the dungeon door and taking a case.

## Physical Appearance

Upon birth, Jack took on the form of a Caucasian human young adult with dark brown hair when recalling his mother's words of the world being dangerous for an infant. Jack's eyes glow gold, unlike any other angel, or archangel, but similar to the glowing eyes of genetic werewolves and shifter werewolves. They often glow when Jack uses his powers, or is feeling strong emotions.

When Sam discovered Jack hiding in the corner of the room, he was visibly frightened by Jack's somewhat creepy appearance. After he encounters Sheriff Christine Barker, Jack obtains an outfit though he changes after reaching the bunker. Jack appears to be something of a creature of habit with his clothes as Jack is often seen wearing the same outfit or same kind of outfit for extended periods of time such as Jack's time in Apocalypse World.

This trait was something that annoyed his godmother, Diana, to an explosive degree, as she literally had to pry his clothes from him, after he wore them for several weeks, so that she could clean them, and they had so much dirt and blood on them, that she had to wear masks from World War II to be able to breath normally when washing Jack's clothes. She never washed them with anyone else's, and had to use old sheets from the Men of Letters linen closets, so that nobody would miss their clothes. She also washed Castiel's clothes this way.

Jack has also been shown with a large pair of angelic wings, which seems to be as big as those of Archangels. He once used them to shield Mary from the explosion Kevin caused, and he showed them after absorbing Alternate Michael's grace to show the others his powers are back. He also shows them to Eli Hale on occasion, when being allowed to visit him, and his family, with Diana.

## Powers and Abilities

As a Nephilim, Jack is one of the most powerful beings in all of Creation; however, as the son of a human and an archangel, Lucifer himself, Jack's power far exceeds that of any Nephilim. It has been stated numerous times that Jack possesses unimaginable power and according to his father, his power is "a chip off the old ball of heavenly light". Doctor Hess claimed the child could destroy the whole universe. At full power, he is stronger than any angel.

### Nephilim Abilities:

* **Mid-Tier Nigh-Omnipotence** - As the Nephilim child of the second oldest Archangel, Jack is an extraordinarily powerful entity, described as holding unimaginable power by Castiel. Even while unborn, he could still perform feats of great power such as resurrecting and healing his mother when she attempted suicide and even granting the Seraphim Castiel the power to effortlessly kill the Prince of Hell Dagon. After being born, Jack is deemed capable of achieving almost any feat he desires by Miriam. He was so powerful that while not even in the same realm, he awakened Castiel from his eternal slumber inside the Empty. The Angels also considered Jack's power as being so great that he is capable of creating more Angels. Additionally, due to being sired by the second oldest Archangel and therefore inevitable to become much more powerful than he is, Jack's power is so great that he has shown the ability to effortlessly defeat and kill even the Archangels, as shown by how he was easily able to overpower and later killed Alternate Michael, who was the most powerful angel to appear. This feat is made all the more impressive by the fact that Jack was relying on the power of his soul at the time, and was weaker than he would have been when he still had his grace, though the power this required resulted in his soul fully burning away, rendering him soulless for a time. Due to his power, most angelic weaknesses that would affect angels, other Nephilim and even the Archangels have absolutely no effect on him and even on most extreme occasions, he has been seen to still retain a certain amount of resistance to them.
	+ **Astral Projection** - Jack was able to project his awareness into Michael's fortress to discover that it was in fact empty. He also can show his wings
	+ **Banishing** - Jack managed to effortlessly banish Lucifer back to The Empty.
	+ **Biokinesis** - Jack was able to easily inflict pain on Michael that was enough to damage his vessel and bring him down to his knees, leaving him severely weakened and unable to fight, a feat never seen before even Lucifer was shocked.
		- **Rapid Aging** - Soon after birth, Jack willingly accelerated the natural aging process of his body to quickly become a young adult.
	+ **Supernatural Perception** - Jack could perceive the true form of angels without any ill effects. This was best seen when he identified the Alternate Michael in their first meeting.
	+ **Clairsentience** - While experimenting in attempting to open a Rift to Apocalypse World, Jack was able to feel the Alternate Realities. He was also able to identify who Michael was when he first saw him. While in Heaven, Jack was able to tell something was amiss and left out. Naomi stated it was because of his angelic heritage that let him detect it. After his powers were restored, Jack was able to feel that injection Nick had used on Donatello was previously filled with angelic grace. Even while he was powerless, Jack was able to sense another presence, something beside him and the Winchesters still in the world after God erased everyone.
	+ **Conversion** - Jack is able to forge human souls into angels.
	+ **Conjuration** - Jack was able to make worms appear inside a priest's body.
	+ **Electrokinesis** - Jack's labor caused a power outage. In his normal state, he also able to affect the works of machinery and electricity, such as lamps and a vending machine. When scared, he also can cause electricity to go haywire. He was able to turn off the engine of the Impala.
	+ **Healing** - From the womb, Jack was able to heal Kelly Kline's slit wrists and massive blood loss. While empowering Castiel, he also healed the angel's injuries from the fight with Dagon in a manner of seconds.
	+ **Illusion** - To entertain some kids, Jack was able to alter the shadow puppet shapes he was making to look like whatever he wanted.
	+ **Localization** - Jack was able to locate Lucifer and Castiel at the camp. He also tracked Sam's location to the Men of Letters bunker when he prayed to him.
	+ **Molecular Combustion** - When Jack and Kaia combined powers to open a rift to an alternate reality, Kaia's screams caused the rift Jack was opening to emit a yellow glow that caused six nearby angels to turn to dust. After lifting Zachariah into the air with telekinesis, Jack was able to cause Zachariah to explode simply by clenching his fist. By sending energy pulses similar to his telekinesis into the air, Jack caused three more angels to explode in mid-air. In a moment of anger, Jack accidentally used this power to obliterate Mary Winchester, leaving an angelic blast site behind and no body.
	+ **Photokinesis** - When Jack was born, his birth caused him to emit a yellow blast of light that briefly knocked a nearby Mary Winchester unconscious.
	+ **Portal Creation** - Jack's birth was able to open a rift into an alternate reality.
	+ **Power Granting** - From the womb, Jack was able to temporarily empower Castiel to the point that he was able to overpower and kill the Prince of Hell Dagon.
		- **Super Strength** - While empowering Castiel, he granted him enough levels of superior strength to effortlessly overpower the Prince of Hell Dagon, who had easily beaten Castiel while he was only using his seraphim powers.
		- **Power Negation** - While empowering Castiel, he granted him the power to render Dagon completely powerless.
		- **Pyrokinesis** - While empowering Castiel, he granted him the power to burn Dagon, the Prince of Hell, to ashes.
		- **Invulnerability**- Jack was able to protect Mary from the suicide bomb spell of Kevin Tran using his wings.
	+ **Pyrokinesis** - Jack burned Nick to death from the inside, leaving the outside of his body scorched.
		- **Thermokinesis** - After Jack was born, his footprints scorched the parts of the floor of Kelly's cabin he had walked on. When he and Kaia open a rift together to the Bad Place, the wave of energy Kaia's screams released from the rift Jack was opening was able to heat up the angel blades of six nearby angels to the point that they became half melted into the floor. He was later able to heat up the bars in the warded window of a cell in Michael's fortress to the point that they melted.
	+ **Reality Warping** - Under the guidance of a disguised Asmodeus, Jack was able to open a Hell Gate to an almost inaccessible section of Hell to release the Shedim. However, doing this required Jack's full concentration and when his concentration broke, the Hell Gate closed.
	+ **Resurrection** - At the same time he healed his mother's injuries, he resurrected her. However, Miriam indicated that, despite his vast power, Jack is not powerful enough to resurrect Castiel as he is "all the way dead". Jack has never displayed this power on his own outside of the womb, relying on Lucifer to resurrect Maggie and trying to use a spell to resurrect Mary Winchester.
	+ **Salt Transmutation** - Jack was able to transform a human into a pile of salt.
	+ **Soul Manipulation** - The raw energy of Jack's soul fully magnified was capable of vaporizing multiple hellhounds into oblivion.
	+ **Spell Casting** - Jack has the ability to cast powerful spells such as the Necromantiorum from the *Book of the Damned*. However, the spell failed to work as Jack lacked Mary Winchester's body.
	+ **Terrakinesis** - When Jack got angry at Asmodeus for harming the Winchesters and Donatello, his anger caused the ground to shake for a moment. In *Jack in the Box*, Jack was able to open and close earth underneath a woman accused of being a fake health healer to swallow her up. While trying to break out of the Ma'lak Box, Jack caused the box and the bunker to shake violently.

* **Telekinesis** - Jack was able to send out powerful blasts of telekinetic energy strong enough to knock two people unconscious at once. When Jack did this, visible waves of energy emanated out of him. In a moment of pain, Jack accidentally threw a tattoo artist across a room. This happened without the visible waves of energy, indicating that Jack can use both forms of telekinesis. In order to save Sam's life, Jack blasted Buddy across a room with a telekinetic blast emanating from his hand while deflecting a bullet just by looking at it. Following this, Jack gained control of his telekinesis, using it to levitate a pencil and creating a small shockwave to knock Sam, Dean, and Castiel to the ground.
* **Telepathy** - Jack showed the ability to telepathically call out to Castiel who could hear Jack even in the Empty. Even the Shadow was surprised how could something wake Castiel in his domain. Later, by touching his hands to Derek Swan's head, Jack was able to see everything that Derek saw with his powers. However, using this power on Derek caused the veins in his face to glow. Jack later used this ability, in the same way, to show the Winchesters and Kaia Nieves what Derek had seen of the alternate universe and their mother.
	+ **Sedation** - Like an angel, Jack can put a person to sleep with just a touch.
	+ **Precognition** - Jack, from the womb was able to see a vision of the confrontation between Castiel and Dagon at the Heavenly Portal, which he was able to share with Kelly.
	+ **Mind Control** - Jack was able to make Lucifer tell him the truth against his own will. By simply saying "stop lying", Jack was able to make the entire planet tell the truth against their will.
	+ **Empathy** - Jack was able to sense the pain of Sylvia.
* **Teleportation** - Jack displayed the ability to teleport after being upset by a conversation and wanting to be away from it. He was later able to use this ability to leave the Men of Letters bunker on purpose. When he teleports, Jack is shown to have the sound of wings flapping like an angel. Lucifer said he and Jack can go anywhere in the Universe.
	+ **Apporting** - By putting his hand on Rowena he managed to send her back to her flat and telekinetically fling her against her desk without being there, a feat that has never been seen before. Jack managed to effortlessly teleport fifteen people to heaven with ease.
* **Super Stamina** - Jack once stated that he does not sleep a lot, but unlike an Angel, he still requires sleep. Lucifer once attempted to get Jack to go to space with him in an attempt to keep his deal with Michael from getting exposed; implying that Jack may not need oxygen.
* **Super Strength** - Jack wields enormous levels of superhuman strength that is clearly far above any Nephilim before him. While empowering Castiel, Jack enhanced his strength to the point of effortlessly restraining Dagon one-handed. After being born, Jack displayed sufficient strength to easily rip off the doorknob of a door that was triple-locked without even realizing it. In physical combat, Jack has been shown to effortlessly throw opponents around, and at one point he effortlessly knocked Castiel, a powerful Seraphim, to the floor with enough force to incapacitate him for a few moments and almost strangled a young man to death in less than a minute with one hand while enraged.
* **Supernatural Concealment** - When Jack does not want to be found, his powers are subconsciously concealing him from other beings which was shown by the fact that Asmodeus, Lucifer and everyone else who were looking for him were incapable of tracking his whereabouts. A demon stated that Hell had exhausted all its resources in an attempt to find him. This is notable considering how his immense power usually makes him very easy to locate. God was able to easily locate Jack in order to send Dean to kill him. Later on, Jack had to stay hidden in The Empty in order for God not to locate him.
* **Life Force Draining** - Jack is capable of draining a being of their life force. At the request of Castiel, Jack was able to draw most of the Seraphim's life force out of him by placing his hand on Castiel's head and concentrating, though Jack funneled the life force into a flask so that he could restore it later.

* **Immortality** - When Jack was dying after losing his grace, he claimed he would have lived forever if he still had it. Alternate Michael came to the same conclusion, claiming that Jack would "know time that makes mountains, that wipes out species" alongside Michael. Castiel also stated in time that he and Jack will have to watch the Winchesters die as they continue to live on.
	+ **Nigh-Invulnerability** - As the Nephilim Spawn of the second strongest archangel in creation, Jack possesses complete invulnerability to almost any harm. Unlike the other Nephilim, Jack is completely invulnerable against an angel blade as being stabbed in the heart with one by Miriam had no effect on him. Jack had stabbed himself in the chest several times with a butcher knife and did not die while such damage would kill any ordinary human. However, Jack can still feel pain, as shown when he flinched and reflexively threw a tattoo artist because of the pain from the needle, and can also be knocked out and injured by blunt force trauma to the head as any ordinary human, albeit this is usually when he is caught off guard or already in a state of shock. After he was flicked across a room by Michael, even while his powers were significantly weakened he was shown to recover quicker than any regular human would have. Even Zachariah, a powerful angel whose powers weren't affected by the warding was unable to recover as quickly as he did.
	+ **Immunity** - Despite his angelic heritage, Jack is immune to angel banishing sigil, a weakness that even Lucifer was affected by. However, the sigils do have an unseen effect on him, causing him pain and making golden marks appear briefly on his veins. He is also immune to most angel warding though being inside a building with very powerful warding can dampen his abilities, as seen when he was in Michael's fortress, he could do nothing with his powers. However, he was capable of thermokinetically melting the bars in the window of Michael's fortress due to the warding being somewhat weaker there.
	+ **Regeneration** - He was able to easily remove an angel blade from his chest and the wound quickly healed in seconds. After getting two tattoos, both healed in seconds to the point that there was no sign that they had ever existed. After Jack stabbed himself several times in the chest with a butcher knife, his wounds healed in mere moments.
* **Inherent Omniscience** **(possibly)** - According to Asmodeus, Jack is full of timeless knowledge. Even before he was born, Jack was already able to comprehend his pregnant mother's suicide attempt and use his powers to resurrect her, as well understand and remember some conversations that Castiel had with Kelly Kline while Jack was still in her uterus. Moments after he was born, Jack already had some basic knowledge like how to talk, walk, use some of his powers (like how he used his powers to grow up fast), etc. However, from that point forward, he only exhibited human-like awareness.
* **Absorption** - After Jack survived the explosion when he became a "metaphysical supernova" he was turned into sort of a power vacuum. He gained the ability to passively absorb any energy that comes into contact with him, even the life energy from plants. While Lucifer and Michael were fighting Jack had been absorbing the energy that came off from them, including the energies released from the two archangels deaths. When he absorbed enough power he became unstoppable, immune to even God’s attempts to smite him. Once he gained enough power, he was able to extract and absorb God's power and make it his own, rendering God permanently powerless.

### Other Abilities:

When Jack's Nephilim powers from his grace were extracted and absorbed by Lucifer, he was left powerless. However, he stills possesses a degree of moderate hunting skills and intelligence that help him stay somewhat useful.

* **Proficient Hunting Skills** - Jack has learned a level of hunting skills from his time with the Winchesters, an example being that he has learned how to research for cases which he stated was from watching them do it themselves. He was able to research lore to learn about dreamwalkers and their ability to see into other realities, which is notable what with the lore on Dreamwalkers being inconsistent. Jack and Castiel made an effective hunting team even without the presence of the Winchesters, although Jack makes the mistake of showing his FBI badge upside down.
* **Skilled Hand-to-Hand Combatant** - Alternate Bobby Singer taught Jack some basic boxing techniques. He was also able to tackle Garth off of Sam and restrain him for a time. However he lacks proper training like Sam and Dean and similar to Crowley, mainly uses his powers to give him the edge in a fight.
* **Intelligence** - Despite having quite a naïve personality, Jack has proven himself to be very intelligent on occasions. When a group of angels were pursuing him the Winchesters into the Sunstar Line cargo ship, Jack predicted that the angels would use angel radio on him as soon as they got to him, due to angels using it on him before.
	+ **Intuition** - Jack has shown himself to be quite intuitive. From the womb, he was able to instinctively tell that Castiel could be trusted after feeling him touch Jack's kicks. Jack even stated that he remembers feeling safe at that very time.
	+ **Manipulation** - He was able to successfully manipulate Harper Sayles' zombie boyfriend Vance into believing he wanted to be with her, so that Vance would get jealous and come out so Dean could bind him. He also managed to goad Dean and Castiel, who have both had experience with people manipulating them over the years, into believing that his condition was just a regular cough for some time, with Dean only finding out the truth when Jack bled and collapsed in front of him.
* **Adaptability** - Jack has shown himself to be highly adaptable to certain situations.
* **Enochian Magic** - With the loss of his grace, Jack's Nephilim body fell out of balance between his angel and human halves and started to deteriorate and eventually caused him to die. With the help of Castiel placing his soul back into his body from Heaven and the ritual taught to him by Lily Sunder, Jack was able to use Enochian magic to harness a small part of his soul to stabilize his condition to stay alive. With Enochian magic he was able to use a part of his soul to use his previous powers, but burned off pieces of his soul in the process each time. When killing Michael using this magic, Jack burned off his entire soul.
	+ **Angelic Exorcism** - Jack was able to pull Alternate Michael from Rowena's body.
	+ **Energy Blasts** - Jack was able to emit powerful blasts of energy able to knock Michael off of his feet.
	+ **Healing** - After Castiel was poisoned by Gorgon venom, Jack used the power of his soul to heal him when the anti-venom didn't work.
	+ **Invulnerability** - When Jack was blasted by Michael, he was knocked down at first but later withstood it like it was nothing.
	+ **Molecular Combustion** - When the Men of Letters bunker was attacked by a group of monsters, Jack was able to disintegrate them all at once, burning away another piece of his soul in the process.
	+ **Pyrokinesis** - After exorcising Michael from his vessel, Jack was able to burn away his true form, leaving only Michael's grace behind for Jack to consume.
	+ **Regeneration** - After being resurrected, Jack used the Enochian magic to heal the condition that had killed him in the first place. After his condition reoccurred, Jack used the magic to heal himself again.

## Weaknesses

### Harming, Misleading or Trapping

* **Angel Radio** - Hearing the angels communicate over "angel radio" causes Jack debilitating pain for unknown reasons. However this only occurred shortly after his birth while his powers were not properly developed yet.
* **Archangel Blades** - An archangel blade is capable of harming Jack as seen when Lucifer cut Jack's throat and took his Grace. Mrs. Butters seemed to think that an archangel blade, even wielded by a regular human such as Dean, was capable of killing him, but this is unconfirmed.
* **Grace Extraction** - Before Jack's birth, Sam theorized that extracting his grace would leave him powerless and thus not a threat. Lucifer extracted most of Jack's grace with an archangel blade, leaving him completely powerless. Although it was revealed that Jack's Grace will slowly recharge, as of now, Jack has not regained any of his powers. Its revealed that his grace is what holds his human and angel halves in balance and, when he lost it, his two halves come in conflict with each other, causing Jack's body to shut down progressively. The only way to revert that is for the Nephilim to recharge their grace. Even when given Archangel grace from his uncle, Jack's body did not accept it and his condition only worsen.
* **Ma'lak Box** - The Ma'lak Box was able to briefly contain Jack's powers, however he was able to explode the box and the surroundings with ease when he really tried.
* **Resurrecting Angel Ritual** - Making the ritual using Jack's blood made him feel great pain, but after asking Mary permission to use his powers he showed no pain even within the presence of the ritual.
* **Unexpected Mechanical Trauma** - While Jack has the superhuman endurance to shrug off bullets and knife wounds, Jack can be knocked unconscious or temporarily stunned with pain by physical forces when he is caught off-guard (or already in a state of shock). Sam had once knocked Jack unconscious by unexpectedly electrocuting him in the back with a taser, the shapeshifter Buddy was able to knock Jack unconscious by hitting him in the head with a fireplace poker after catching him off guard. It should be noted that these occured before Jack developed his powers.
* **Very Heavy Angel Warding** - Jack's powers were severely weakened by the powerful warding in Michael's fortress, leaving him vulnerable to the powers of Michael and Zachariah. The warding was so much that when Jack attempted to use even some of his more easily controlled powers, he could do nothing. In a spot where the warding was weak, Jack was capable of using a weaker ability to melt metal bars. Despite Jack's powers being weakened he managed to break out of the Ma'lak Box with ease.
* **Witchcraft** - While Rowena had contemplated fighting back against Jack using her magic, indicating that magic does have an effect on him, she admitted that she would not win a fight with him, indicating that although powerful magic could affect him, they do not have the ability to do any significant resistance. Using a potion made from Yarrow root and ground jaw bone in Jack's smoothies administered over time, Mrs. Butters was able to greatly weaken his abilities.
* **Mortality** - After having his grace extracted, Jack has become completely mortal and vulnerable to injury. A beating from Lucifer left his face heavily bruised and bleeding while stabbing himself in a suicide attempt caused Jack to bleed heavily before he was stopped. Jack is stated to be as vulnerable as any human with his powers still having not returned.

### Killing

Due to Jack being one of the strongest beings in existence very few things can kill him.

* **God** - At his previous level during the time of his second death, Jack was no match for his grandfather. With a snap of his fingers, God was able to smite Jack, killing him. Following his resurrection, Jack was forced to hide until he could become stronger as God could easily kill Jack again if he became aware of Jack's return. After his survival of the initial explosion in the Empty and becoming a power vacuum that had absorbed enough energy, Jack became immune to God's and Amara's powers, best seen when God failed to smite him, Jack was then capable of absorbing all of God's powers.
* **The Equalizer** - A gun crafted by God himself that can kill him although it also cost the life of the user, if the user fatally shot him with it.

## Relationships

##### Family:

* Jack and Castiel (Adoptive Father/Son, Guardian/Ward, Uncle/Nephew)
* Jack and Kelly (Mother/Son)
* Jack and Sam (Adoptive Family)
* Jack and Dean (Adoptive Family)
* Jack and Diana (Guardian/Ward, Godmother/Godson)
* Jack and Gabriel (Uncle/Nephew)
* Jack and Amara/The Darkness (Great-Aunt/Grand-Nephew)

##### Allies:

* Jack and Conri (Allies/Friends)
* Jack and Derek (Allies/Friends)
* Jack and Peter (Allies)
* Jack and Malia (Allies/Friends)
* Jack and Danae (Allies/Friends)
* Jack and Eli (Good Friends)
* Jack and Nixie (Allies)
* Jack and Naeomi (Allies)
* Jack and Jenefer (Allies/Friends)

##### Enemies:

* Jack and Billie
* Jack and Dagon
* Jack and Asmodeus
* Jack and the Angels
	+ Jack and the Angels of the Apocalypse World
* Jack and Michael
	+ Jack and Alternate Michael
* Jack and Lucifer
* Jack and God

## Etymology

* **Jack:** late Middle English: from *Jack*, pet form of the given name *John* . The term was used originally to denote an ordinary man (jack1 (sense 7)), also a youth (mid 16th century), hence the ‘knave’ in cards and ‘male animal’. The word also denoted various devices saving human labor, as though one had a helper (jack1 (sense 1, sense 3, sense 10, sense 11), and in compounds such as jackhammer and jackknife); the general sense ‘laborer’ arose in the early 18th century and survives in cheapjack, lumberjack, steeplejack, etc.
* **Kline:** Americanized form of German, Dutch, and Jewish Klein . Slovenian: derivative of klin 'wedge, wooden peg', used as a topographic name for someone who lived on a wedge-shaped piece of land.

## Quotes

* "My mother, she said Castiel - he would keep me safe. She said the world was a dangerous place, that's - that's why I couldn't be a baby or a child. I - that's why I had to grow up fast, that's why I chose him to be my father."

* "Every time I try and do something good, people get hurt."
* I like it. I like nougat.

* Jack: I'm not going to talk. I'm going to listen.
* Lucifer: He's gonna listen.