Xarus is a fictional character appearing in American comic books published by Marvel Comics. He was created by Vic Carrabotta and first appeared in Mystic #17 (November 1952).

Xarus is the son of Dracula. Dissatisfied with Dracula's leadership, Xarus formed a secret alliance with the leaders of various vampire sects to overthrow his father. Their coup was successful and Xarus and his allies beheaded Dracula.^[1][2]

His allies in Mystikos developed devices that neutralize the harmful light frequencies to which vampires are vulnerable. Xarus saw an opportunity to use these devices to establish a stronger, more dominant position for vampires in the world. He distributed them to his allies, who launched a raid on Krieger Sect's fortress, eliminating their senior leadership. Xarus instructed the Claw Sect to hold off on declaring loyalty to him, allowing them to remain neutral and open to potential traitors seeking an alliance, including his brother Janus and the peaceful Anchorite Sect.^[1][2]

After the Siren Sect's attempted betrayal, Xarus surprisingly spared their leader, Alyssa, allowing her to live and continue serving him. However, Alyssa betrayed him again by giving Janus one of the light-deflecting pendants, helping him escape after the Claw Sect had turned on Xarus. Surrounded by a small army of vampires wearing the pendants, Xarus was declared Lord of the Vampires.^[1][2]

Now with greater power, Xarus set his sights on world domination. He planned to convert all mutants in San Francisco into vampires, starting with infecting Jubilee to draw in her fellow X-Men. Wolverine was the first to take the bait, quickly converted with no resistance from his healing factor.

Xarus’ actions against mutantkind caught the attention of Cyclops, who reached out to him directly. Xarus tried to persuade Cyclops to join forces, arguing that both their kinds had been mistreated by humanity. Cyclops firmly rejected the offer, exactly as Xarus had anticipated. With this response, Xarus moved forward with his assault on Utopia. However, the X-Men and Atlanteans were prepared. They revealed that Wolverine’s healing factor had been deactivated before he could revert to his human form, and Xarus watched in disbelief as his entire task force was destroyed. Though he didn’t have time to regroup for another attack, Xarus was determined to defeat the X-Men. Just then, Dracula made his return, resurrected by the X-Men. Xarus attempted to rally his forces to stand against his father, but found no support, forcing him to fight alone. In the end, Dracula exacted revenge, ripping off Xarus’ head and killing him.

The X-Cutioner is an alias used by two fictional characters appearing in Marvel Comics.

Carl Denti, created by Scott Lobdell and Jason Pearson, first appeared in The Uncanny X-Men Annual #17 (June 1993).^[3] A former FBI agent obsessed with stalking mutants who kill humans, he uses an array of both alien and Earthly technology in his quest.

Denti's father was an army officer murdered for following an illegal order, which would later interfere with his crusade against mutants. As an F.B.I. officer, Denti partners with Fred Duncan, a contact of Charles Xavier's and a member of the mutant supporter network known as the Xavier Underground who maintains mutant criminal records and stockpiles the weapons and technology of the X-Men foes. Denti takes the files, weapons, and technology for himself and assumes the name X-Cutioner, with the proclaimed mission of killing any mutant that has killed other people first. Denti is so "dedicated" to his mission that he will use lethal force to stop anyone obstructing his lethal "justice".

His first successful target is the mutant Tower,^[4] followed by an unsuccessful attempt on Mastermind who was detained on Muir Island. Mastermind survives only to die of natural causes, because the X-Cutioner was delayed when he encountered the X-Men. He next targets the White Queen, only to be stopped by the father-and-son duo of Cyclops and Cable. He later tracks down Skin for the murder of Angelo Espinosa, not knowing that the two boys were the same person. Working through the ranks of X-Men characters, he next encounters the Punisher, Rogue, X-Man and Gambit. After teaming up with Gambit, Denti encounters a new version of X-Cutioner (see below) with similar technology.

A normal human with specialized training, X-Cutioner's weapons and technology include alien Z'nox sensors, Sentinel propulsion units for flight, Shi'ar body armor, a personal force field, a teleportation unit and various other weapons.

An unidentified version of X-Cutioner, created by Marc Guggenheim and Ardian Syaf, first appeared in X-Men Gold (vol. 2) #2 (April 2017).^[5]

The Carl Denti incarnation of X-Cutioner appears in X-Men '97, voiced by Lawrence Bayne.^[6] This version is a leading member of the Friends of Humanity.

Xilora, formerly known as Xilo, is a fictional character appearing in American comic books published by Marvel Comics. He was created by Gerry Duggan and Pepe Larraz and first appeared in Planet-Size X-Men #1 (August 2021).

Originating from the ancient Threshold civilization two billion years ago, the mutant that would eventually take the name Xilo was one of two survivors of Threshold's fall, the other being Okkara.^[7][8] During the fall, he was injured so severely that he lost many of his memories and needed millions of years to heal and recover.^[9] He remained with Okkara and served as its defender, taking many different names over time, until the island was attacked by the forces of Amenth and split into Krakoa and Arakko. He, along with all the other Okkaran mutants, was voluntarily sealed away in Amenth with Arakko to stop the invasion.^[10] For the next several thousand years, he served on the Great Ring of Arakko as the chief historian, consulted on all matters of history and lore.^[11] At some point, he took the name Stulgid.^[12] After Arakko and its inhabitants returned to Earth, Stulgid changed his name to Xilo-Who-Was-Stulgid and later to simply Xilo.^[11][13]

Xilo was enlisted to help terraform Mars into a suitable home for Arakko, using his powers to fertilize the soil and create a breathable atmosphere.^{[13][14][15][16]}

When the Eternal Uranos attacked Arakko, Xilo was gravely injured, reduced to 13.5% of his original body mass and losing millennia of memories. Having lost a great deal of his identity, he renamed himself That-Which-Was-Xilo to reflect this.^[17][18]

When Genesis returned to Arakko and incited a civil war, That-Which-Was-Xilo sided with Storm. To survive in his weakened state, he partially merged with the Fisher King, becoming dormant and occasionally warning his host of danger.^[19][20][12] During the final battle of the war, the Fisher King got close to a blinded Ora Serrata. That-Which-Was-Xilo seized the opportunity to leave the Fisher King (killing him in the process) and take control of Ora. He took the new name Xilora, unified the Great Ring of Arakko, and declared the end of the Genesis War.^[21][22][23]

Xilora is an Omega-level mutant whose body consists of an insect collective that can act as a single being or separate into innumerable tendrils. He is able to merge with other beings, replacing their flesh with himself and manipulating them according to his intention. As a collective, he can replace parts of himself and is functionally immortal, having been alive for at least two billion years.^{[8][24][25][26]} If his body is damaged, he will permanently lose parts of his memory.^[17]

After merging with Ora Serrata, Xilora gained her ability to erase things in sight from existence.^[21]