Karn is a member of the Inheritors from the Spider-Verse storyline, who wanders the Multiverse to slay Spider Totems. He first appeared in Superior Spider-Man #32 (September 2014)^[1] and he was created by Dan Slott, Christos N. Gage and Giuseppe Camuncoli.

During the hunt against the Master Weaver, he hesitates to deliver the finishing blow, leading to the death of his mother. As a result, he is condemned to wear a mask by his father Solus and exiled to hunt Spider Totems to earn his place back to the family.^[2]

A time-displaced Superior Spider-Man (Doctor Octopus' mind in Peter Parker's body) later discovered Karn. Assembling an army of Spider-Men, the Superior Spider-Man and his team ambushed Karn while hunting the Spider-Man of Earth-2818, but despite Karn continued to gain the upper hand, the Spider-Men only escaping when two of Karn's estranged siblings showed up and began fighting.^[2] Karn later joins the Spider-Men in their fight against the Inheritors.^[3]

Karn realizes that Master Weaver is his future self. He establishes a new team of multiversal spider-heroes called the Warriors of the Great Web, consisting of Mayday Parker, Spider-Ham, Spider-Man Noir, Spider-Man India, and Spider-Gwen.

During the "Electroverse saga," an alliance of counterparts of Max Dillon invade Loomworld, damaging the great web while forcing the Web-Warriors to retreat to Earth-803. Karn and an alternate version of Doctor Octopus managed to fix the Web, but tangle it at the same time, causing the Web Warriors to become split between realities. Karn's reconnection of Earth-803 into the web also causes an earthquake that frees the Electros caught by the Web-Warriors.^[4]

During the Dead No More: The Clone Conspiracy storyline, Karn welcomes Kaine, but soon realizes that he no longer has the powers of the Other and is now dying from a Carrion virus, and cannot go back to his Earth lest someone catch it. Karn shows Kaine a number of realities with zombie apocalypses caused by this disease, and Kaine decides to visit these realities to find a way to stop it. Kaine tries to keep himself hidden from the Web Warriors while researching, but is caught by Spider-Gwen.^[5]

During the "Spider-Geddon" storyline, each of the Spider-Men and the Master Weaver have been keeping an eye on Earth-3145 by sending different Spider-Bots to check on them, discovering that while alive, the Inheritors have gotten malnourished from lack of spider lifeforces. Unknown to the Spider-Men and apparently to the Master Weaver himself, the Inheritors are collecting the heads of the Spider-Bots with Jennix stating that they now have the resources they need.^[6] When Spider-UK and Master Weaver get alerted to an Inheritor Cloning Engine on Earth-616, the two of them figure out what is happening. On Earth-3145, Jennix has put the Spider-Bot heads to good use by harvesting their transmitters. As they are unable to send a kill signal to the Inheritor Cloning Engine, Spider-UK advises Master Weaver to call the Web Warriors. When Master Weaver states that nobody can fight the Inheritors and win, Spider-UK states that they'll die trying to keep another world from being destroyed.^[7] Karn is then confronted by Verna for having sided with the Web Warriors as they fight to the death. After Karn stabs Verna, she still feeds on him as he is now a Spider-Totem.^[8] When Karn's dead body is found by Spider-Nor-Man, it is devoured by Spiders-Man of Earth-11580.^[9]

Like the rest of the Inheritors, Karn has the ability to drain the life force from other beings through physical contact. Depending on the power of the individual he drains, his powers and vitality can increase substantially. He also has superhuman strength, speed, reflexes and durability. He has a staff that emits a unique energy signature capable of vaporizing people.

As the Master Weaver, Karn threads the Web of Life and Destiny, gaining dominion over various realities. He can open portals at his command or alter realities.

Khonshu first appeared in Moon Knight #1 (November 1980), and is based on the Egyptian lunar god Khonsu. He is a member of the Heliopolitan pantheon and the patron of the superhero Moon Knight. While Khonshu possessed Moon Knight during the hero's time with the West Coast Avengers, Khonshu was often shown as a largely benevolent god who wanted to assist the team. He was at times shown to be conflicted as to whether he should reveal his powers and what was worthy of it. He was able to effortlessly resist being controlled by the mutant The Voice.

Kindred made his full appearance in Amazing Spider-Man Vol. 5 #5, but was retconned into being first mentioned in Friendly Neighborhood Spider-Man #12 (November 2006). The character was created by Nick Spencer and Ryan Ottley based on a character mentioned by Peter David.

Kindred was an as-yet-unnamed human who went to Hell and degenerated into a Demon. Since he had a unknown history between Peter Parker, he began torturing Mysterio, until the latter agreed to serve Kindred. This led to Kindred resurrecting him, but Mysterio would forget the bargain.^[14][15]

Kindred was aware about Ero's plan about Spider-Man and attempted to use Mysterio in order to convince the Spider-Totem to ally with him, but the totem refused.^[16]

Kindred approached Mendel Stromm and prepared to give him a Master Mold that specializes in creating Tri-Sentinels.^[17] After Spider-Man takes control of the Tri-Sentinels, Mendel Stromm is visited by Kindred. He states that Stromm's usefulness has ended and tears him apart with his centipedes. When Spider-Man is restored to one person following the fight against the Tri-Sentinels, he finds Stromm who quotes "Guess my name" before shutting down.^[18]

In his actual appearance, he is seen threatening Kingpin to not harm Boomerang's roommate Peter Parker. He kills Fisk's associates using supernatural abilities and forces him to back off of Spider-Man after revealing that he is in possession of Vanessa's soul.^[19]

Kindred later discovered Spider-Man's rekindled friendship with Black Cat and claims that Peter "drags everyone into his own Hell."^[20]

During the "Hunted" storyline, Spider-Man had a vision of Mary Jane being killed by the Demon.^[21] As it turned out, Kindred was in fact watching over Mary Jane commenting on her to his centipedes, with one of his centipedes injuring Mary Jane.^[22]

Kindred resumed tormenting Mysterio and came to him during a therapy session between "Mysterio" and "Dr. Ludwig Rinehart", in actuallity, Mysterio as the doctor who had convinced his own doctor that he was instead Mysterio. When Kindred sensed that Peter Parker was dreaming about this scene, he killed the doctor posing as Mysterio, since he knew about Kindred's name. After killing Dr. Reinhart, Kindred directly threatened Peter that he will get his revenge on him.^[23] After Peter woke up, Kindred accused the real Mysterio that he was continually running from his purpose and then hands over a script to Mysterio in order to execute his plan while telling him to stick to it. He is then shown in front a wall covered with photos of Spider-Man, Miles Morales, Superior Spider-Man, Spider-Woman (Jessica Drew), Ghost Spider, Silk, and Scarlet Spider.^[24]

Kly'bn is a fictional deity created by Greg Pak and Fred Van Lente and first appeared in Incredible Hercules #117, while being first mentioned in Runaways Vol. 2 #14 in contrast to his wife Sl'gur't who first appeared in Fantastic Four Annual #24 of July, 1991.

Millions of years ago, after the Celestials had created the Skrull Eternals, Deviants and Prime, the Deviant Skrulls wiped out the other two branches believing that they themselves were the superior branch, leaving only one member of each wiped branch. Kly'bn was the last Skrull Eternal, who convinced the Deviant Skrulls and their Queen Sl'gur't that killing him would be killing themselves, as he was the embodiment of the idea of the Skrull and it was his destiny to lead the Skrulls into changing the other worlds with their truth. Sl'gur't embraced his ideas and became lovers with the two becoming gods of the Skrull Pantheon. Since Kly'bn was unable to shapeshift, Sl'gur't vowed to never keep her form for too long in contrast to her husband.^[25] The couple together wrote the Book of World Skrull, where there was written three prophesies. These prophesies told about the eventual destruction of the Skrull homeworld and about Earth being the new home for the Skrulls. These prophesies were the main reason of the events of "Secret Invasion", being a holy war for the Skrulls.^[25][26] When the God Squad arrived at their fortress via Nightmare's realm, Kly'bn and Sl'gur't were forced into battling them. Sl'gur't was eaten by the Demogorge, but since she represented multiple different deities, the Demogorge exploded due for being too much. Sl'gur't then started a shapeshifting battle against Amatsu-Mikaboshi, with them copying each other. Eventually, Mikaboshi in Sl'gur't form killed Sl'gur't who was in Mikaboshi's form, allowing him to replace her. After, Kly'bn killed Ajak, Hercules started battling Kly'bn. Hercules was able to defeat Kly'bn, after Snowbird impaled him with the spine of the Demogorge.^[25]

Kly'bn reappered as one of the dead deities serving Amatsu-Mikabosi during "Chaos War".^[27]

Amiko Kobayashi was created by Chris Claremont and John Romita Jr., and first appeared in Uncanny X-Men #181 (May 1984). Amiko found herself orphaned when she and her mother were caught in a battle between the X-Men and a dragon. Discovering the dying woman and her young daughter, Wolverine promised that the girl would be raised as though she were his own child.^[28] In the limited series Wolverine: Soultaker, Amiko discovered that her mother belonged to a family of warriors called the Shosei and now spends time with them trying to improve her martial arts skills, and hoping to make her adoptive father Logan proud of her.^[29]

Kobik is a physical manifestation of a Cosmic Cube in the Marvel Comics universe.

The character, created by Chris Bachalo, first appeared in Marvel NOW! Point One Vol 1 #1 (June 2015).

Within the context of the stories, Kobik originated from a S.H.I.E.L.D. project using fragments of Cosmic Cubes. The pieces merge into a single being that adopts the form of a child. Kobik becomes a member of the Thunderbolts.^[30]

During her time affiliated with S.H.I.E.L.D., Kobik is involved in the Pleasant Hill project, where supervillains are taken to a pre-created town and brainwashed to act as normal civilians. At the same time, Kobik comes into contact with the Red Skull, the Cube's past experience with the Skull giving her a certain attachment to him. Using his influence on her, the Skull is able to convince her of Hydra being a noble organization. Kobik later makes contact with the elderly Steve Rogers during a stand-off where his life is in danger, and as a consequence of the Skull's manipulation, she not only reverts him to his youthful state but also rewrites his history so that he has been a Hydra sleeper agent since childhood. As Hydra's "Secret Empire" rises to power in the United States, Kobik begins to regretfully rewrite Rogers' mind, but it is revealed that the memory of his original, good conscious has remained hidden in her mind. The original Steve Rogers tries to convince Kobik to undo her mistakes, but she believes it is too late and is frightened of Hydra Rogers. Making things worse, in the real world Arnim Zola implants a Cosmic Cube into Rogers' physical body during the Resistance's hopeful raid on Hydra's main base, led by Sam Wilson. However, the good Rogers manages to get through to her, and eventually they are both saved by Bucky Barnes and Scott Lang, who takes away Hydra Rogers’ ability to use both the Cosmic Cube and Mjolnir, allowing the real Captain America to defeat his mind-altered self. After Hydra Rogers is defeated, Kobik restores the history of the world, although she leaves some aspects intact from the Hydra-created reality.^[31]

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The first version was originally a very small island in the Pacific Ocean that was located close to where some nuclear bombing tests were done. The radiation somehow mutated the island's ecosystem into a hive-mind entity.^[32] Sergeant Fury and his commando team were accidental witnesses to the bomb drop which created Krakoa in early 1945, and soon afterwards crashed on and encountered the island's collective intelligence, with whom they arranged a peaceful parting in exchange for keeping its existence a secret.^[33][34]

However, Krakoa later became hungry for the unique life energy created by mutants. It was responsible for the deaths of a team of young mutants, composed of Petra, Sway, Darwin and Kid Vulcan (the latter two were able to survive, but became trapped inside Krakoa), from a parallel X-Men team led by Moira McTaggart.^[35] It was later able to capture the original X-Men (then consisting of Cyclops, Angel, Havok, Iceman, Jean Grey and Polaris, which led to the subsequent formation of the new team of X-Men (namely Colossus, Nightcrawler, Storm, Sunfire, Thunderbird, Banshee and Wolverine). The new X-Men team found the original X-Men and by using her powers, Polaris was able to launch Krakoa into outer space.^[32]

Krakoa was later apparently found and captured for study by the cosmic entity known as The Stranger, as seen when Quasar visited one of his 'laboratory worlds'.^[36] Krakoa was eventually freed along with many other specimens^[37] and was last seen orbiting around Earth until the energy wave from M-Day and the Collective awakened Vulcan.^[38] It is also revealed that before it was shot into outer space, Krakoa released several spores from itself, which later plagued the X-Men.

More recently, Professor Xavier (now clad in a Cerebro-like helmet in the body which once belonged to Fantomex) has found near-limitless potential in Krakoa's abilities. Krakoa provides the island home of the new mutant nation in the Pacific Ocean east of Papua New Guinea, as well as the Flowers of Krakoa, the "primary economic resource of the mutant nation". Flowers of Krakoa can grow "habitats", self-sufficient offshoots of Krakoa that can serve as embassies around the world while remaining connected to its mind and "gateways", which provide ways to instantly travel from one part of Krakoa to another. Additionally, the X-Men have developed from the Flowers of Krakoa, three new super drugs which Xavier is offering to every country that formally recognizes Krakoa as a nation. The first drug extends the human lifespan by five years, the second prevents human "diseases of the mind" and the third is a powerful adaptive antibiotic, implied to solve the problem of antibiotic resistance in humans.^[39]

More so, when Cypher communed with Krakoa at Professor X's urging, Krakoa related it's past. Long ago, in ancient times, there was a greater living island creature named Okkara, until it was torn apart by an enemy that came from its core wielding a weapon known as the Twilight Sword. Okkara was then split into two separate creatures, Krakoa and Arakko. This act seems to have created some sort of portal to a Hellish dimension, and demons poured out into the world. Apocalypse arrived with his First Horsemen and sealed away the enemy.^[40] However, both Arakko and the Horsemen had to be sealed away with them, leaving Krakoa feeling mournful and lonely. As time passed Krakoa became inert until being reawakened in early 1945 due to testing from the Americans nuclear bomb drop.^[41]

The first known spore was Vega Superior, who took control of an island, later christened Wagner's isle, whose inhabitants began to worship him. When Nightcrawler crashed his plane there, he found Vega-Superior in the caves under the island, who had inherited his father's memories of the X-Men's genetic code, including that of Nightcrawler. He tries to choke Nightcrawler, but the later manages to escape. He makes versions of the X-Men which Vega-Superior dubs the Vega-Men, out of natural materials, such as a Colossus made of stone, a Wolverine of ice, an Angel made of leaves and vines, a Nightcrawler made of mud and a Cyclops that shoots lava. However, they are much weaker than the original X-Men, and Nightcrawler easily defeats them all. Vega-Superior then chases him into the Ocean before realizing he cannot swim.^[42]

Another spore of Krakoa took control of a construction site on a tropical island, and was discovered and defeated by the Young X-Men when they were investigating the disappearance of 56 construction workers. ^[43]

Later when Wolverine and some of the X-Men splintered away from Cyclops' group, it is discovered that Beast has built the Jean Grey School for Higher Learning on top of a "male" spawn of Krakoa.^[44] After Quentin Quire manages to reason with him, the Krakoa spawn contacts Rachel Summers who ends up translating for him when Rachel tells Wolverine that the Hellfire Club made Krakoa attack them and that he is a mutant like the X-Men. Rachel discovered that this Krakoa was grown by Hellfire Club member Maximillian von Katzenelnbogen (a descendant of Victor Frankenstein) in his artificial supergarden. When Rachel mentions that Krakoa keeps apologizing and wants to join the X-Men, Wolverine ends up letting Krakoa stay as a part of the school.^[45] Not soon after the school began having money difficulties, it is Krakoa who solves the school's problems by growing great quantities of diamonds on the trees he produces.^[46] Krakoa's school grounds, the Bamfs, and Doop were able to prevent Swarm from invading the Jean Grey School.^[47]

Soon afterwards it was revealed that Maximillian von Frankenstein had been able to mass-produce Krakoa's consciousness, and created several volcanic Krakoas to act in defense of the Hellfire Academy^[48], but were all killed in battle against the X-Men.^[49]

Mister Sinister was also able to obtain a spore of Krakoa and like Maximillian von Frankenstein, was able to mass-produce the Krakoa consciousness, and even turned one into a mobile castle in his underground city.^[50] They were however burned down by the Phoenix Force.

After the Terrigen Mists were released into the Earth's atmosphere and began causing the M-Pox plague which was deadly to mutants worldwide, the X-Mansion was moved to the dimension of Limbo where it acted as X-Haven. Krakoa was not part of the displacement, and moved his bio-matter offshore to function as an independent island in the Pacific Ocean.^[51] After Kid Omega, whom was his only companion for a time, returned to the Xavier School on Thor's suggestion. Krakoa came back to New York searching for him as the son of the living island missed his friend.^[52]

In the Ultimate Marvel reality, Krakoa is featured in issues of the Ultimate X-Men. Krakoa Island is south of Genosha (which in this reality is vastly anti-mutant under the reign by Lord Scheele) and the shooting ground for Mojo Adams reality TV shows to execute mutants, such as Scheele's killer Arthur Centino aka Longshot. ^[53]

Kubik is a Cosmic Cube who first appears in Tales of Suspense #79 (Jul. 1966), and as Kubik in Avengers #289 (Mar. 1988). The concept was created by Stan Lee and Jack Kirby and refined by Ralph Macchio. Kubik (once evolved into humanoid form and now a student of the entity the Shaper of Worlds)^[54] returns to Earth when attracted by an anomaly possessing a fraction of its power—revealed to be the robot the Super Adaptoid. The Adaptoid uses its abilities to "copy" Kubik's abilities and banishes the character, intent on creating a race in its own image. The Adaptoid, however, is tricked into shutting down by Captain America. Kubik returns and then removes the sliver of the original Cosmic Cube from the Adaptoid that gave the robot its abilities.^[55] Like all Cosmic Cubes, Kubik possesses the ability to manipulate extra-dimensional energy to alter reality to achieve virtually any effect. Upon reaching maturity, a cube takes on humanoid form with its behavior modeled after the individuals who have possessed it. Kubik's chest also displays a holographic representation of a Cosmic Cube.

Shen Kuei, also known as "The Cat", was created by Doug Moench and Paul Gulacy and first appeared in Master of Kung Fu #38-39 (March–April 1976). He is a freelance espionage operative, and has been both an enemy and ally of Shang-Chi. He is a master thief whose skill in martial arts equals Shang-Chi's. The meaning of the character's name is both similar and opposite to Shang Chi's name.

Marduk Kurios is a demon character created by Gary Friedrich and Herb Trimpe. He first appeared in Marvel Spotlight #13 (January 1974) and was identified as "Satan." He is also presented as the father of the characters Daimon Hellstrom and Satana. Within the context of the stories, Marduk Kurios is a high level demon and ruler of one realm of Hell who has from time to time presented himself as "Satan" or "Lucifer". During the Fear Itself storyline, Marduk Kurios attended the Devil's Advocacy where they talked about the Serpent's actions on Earth. Marduk Kurios taunted Mephisto during this meeting.^[56]

The Dark Elf Algrim the Strong was created by Walter Simonson and first appeared in Thor #347 (Sep. 1984).^[58] He is introduced initially as an ally to Malekith, tasked with guarding the kidnapped Lorelei.^[59] The character was later healed and transformed into Kurse in Secret Wars II #4 (Oct. 1985) by the Beyonder.^[58][59]

In 2015's Mighty Thor issue #14 by Jason Aaron and Steve Epting, the mantle and the powers of "Kurse" were passed on to a new host, a dark elf called Lady Waziria.^[58][60] She reppeared in the 2019's War of the Realms as a subordinate of Malekith.^[61][60]

K'ythri is fictional deity created by Warren Ellis and Carlos Pacheco and first appeared as a depiction along with his wife Sharra in Starjammers #1.

According to the Shi'ar mythology, the two chief deities, K'ythri and Sharra, were the creators of the universe. At first, they were enemies to each other, but were then forced into marriage, in which they found love. At their day of marriage, K'ythri presented her the M'Kraan Crystal as their sign of love.^[70][71]

They were worshipped by the Shi'ar for millennia, until they were killed by Amatsu-Mikaboshi,^[72] but it seems that they had come back to life.^[73]

They were then convinced by Loki that they needed to force the new Thor to take part on their Challenge of Gods in order to prove their superiority. Even though they outscored Thor, thanks to their disposition to cause mass suffering in order complete certain tasks, the challenge's officiate Shadrak declared Thor as the winner, since she inspired the Asgardians gods to help her in defense.^[73] Infuriated, they called upon "their sister" the Phoenix Force to destroy all reality, but with the help of Quentin Quire, Thor and the Asgardians appeased the Phoenix Force. Sharra and K'ythri were then imprisoned in Omnipotence City, since they had broken the divine law.^[73]