Excalibur is a superhero group appearing in American comic books published by Marvel Comics. They are depicted as an offshoot of the X-Men, usually based in the United Kingdom. Conceived by writer Chris Claremont and artist/co-writer Alan Davis, they first appeared in Excalibur Special Edition #1 (1987), also known as Excalibur: The Sword is Drawn. Stories involving this team have featured elements of both the X-Men and Captain Britain franchises, frequently involving cross-dimensional travel.

The initial Excalibur roster, which was featured in the first eponymous series from 1988 to 1998, consisted of original Captain Britain Brian Braddock and his lover Meggan, along with three former members of the X-Men: Shadowcat, Nightcrawler, and the second Phoenix, Rachel Summers. A new iteration of the team was featured in the 2005 series New Excalibur until the title was replaced in 2008 by Captain Britain and MI13. Another Claremont-written series entitled Excalibur, though with no connection to the original team, chronicled the efforts of X-Men founder Professor Charles Xavier and his former nemesis Magneto to rebuild the mutant homeland of Genosha.

The current iteration of the team is led by Betsy Braddock, who took up the Captain Britain mantle during the Dawn of X.

Excalibur (vol. 1): 1988–1998 Excaliburs original creative team, writer Chris Claremont and artist/co-writer Alan Davis, incorporated elements of two Marvel properties: the X-Men and Captain Britain.

The X-Men are a group of mutants—evolved human beings born with extraordinary powers—who use their abilities to defend a society that both hates and fears them. Claremont had authored their series since 1976, guiding them to tremendous success. He borrowed four characters from the X-Men, who formed the team under the mistaken impression that their fellow X-Men were dead: Nightcrawler (Kurt Wagner) – a German mutant who possesses the ability to teleport, becomes nearly invisible in shadows, and has a demon-like appearance. Phoenix (Rachel Summers) – a telekinetic and telepathic young woman from a dystopian future. She plays host to the Phoenix Force, a powerful cosmic entity which once posed as her mother, Jean Grey. Shadowcat (Kitty Pryde) – A teenage computer expert with the ability to "phase" through solid objects. Lockheed – A small dragon-like alien and Kitty's pet.

A Marvel UK property, co-created by Claremont in 1976, Captain Britain is a protector of Great Britain, endowed with superhuman powers by the legendary wizard, Merlyn. Alan Davis and Alan Moore, during their joint early-1980s stint, established that the Marvel Universe's Captain Britain was one of many from various dimensions and that one of his main roles is guarding the lighthouse that is placed at the convergence of realities.

Excalibur, which also featured shapeshifter Meggan, first gathered together in Excalibur Special Edition #1 (1988) and were soon featured in a monthly Excalibur series. With the help of a manic, dimension-hopping robot named Widget, they embarked on a series of adventures through parallel worlds.

Claremont left with Excalibur #34 (1991). Beginning with Excalibur #42, Davis returned to the series, this time as both writer and penciller, and resolved many plotlines that Claremont had left unconcluded. He also added several new members, including the mystic Feron, the warrior Kylun, and the alien Cerise; and also introduced the size-shifter Micromax. (In an interview in Wizard #6, Davis said that he was adding four new team members to the team. Presumably, if Davis' run had not ended prematurely, Micromax would have become a full member of the team during Davis' tenure, rather than the start of Lobdell's.)

In a jarring transition, Captain Britain was lost off-panel, Meggan was suddenly catatonic from losing him, and the newer members were summarily dispatched. Marvel stationed the team on Muir Island, off the coast of Scotland, and tied the series closer to the X-Men mythos, casting off most Captain Britain-related elements, in addition to the characters that did not have close ties to the X-Universe, like Kylun and Feron. Phoenix was written out and, when Captain Britain returned, he began using the alias "Britannic". Lobdell also introduced Douglock, an amalgam of two previously deceased members of the New Mutants: the techno-organic alien Warlock and the linguistic savant Cypher. Nightcrawler's former lover, the mystic Amanda Sefton, also joined the team, using the codename Daytripper.

Revisions made under Warren Ellis included reverting Britannic back to Captain Britain and adding Pete Wisdom, a cynical British spy who could manifest solar energy in the form of "hot knives" that could be shot out from his fingers. Ellis also developed a romantic relationship between Wisdom and Shadowcat. At the insistence of Marvel editors, Ellis also added Wolfsbane, a Scottish werewolf-like young woman from the New Mutants and X-Factor, and Colossus, the Russian X-Man who can turn his flesh into organic steel; the latter's inclusion introduced a love triangle angle between him, Wisdom and Kitty, who had turned to Wisdom in the wake of Colossus' estrangement after he had joined Magneto's Acolytes.

Sales fell and Marvel canceled the series, partially so Nightcrawler, Shadowcat, and Colossus could return to the X-Men. The series ended with issue #125 (1998), featuring the wedding of Meggan and a de-powered Captain Britain.

Excalibur (vol. 2): 2001 In 2001, a four-issue limited series titled Excalibur, featuring Captain Britain, Meggan, Psylocke, the Black Knight, Sir Benedict, Captain U.K., and Crusader X, detailed Captain Britain's rise to become king of the extra-dimensional realm of Otherworld.

The solicited cover to issue #1 featured a new costume for Captain Britain that was different from the one that he actually received in the comic, but the cover was unused.

Excalibur (vol. 3): 2004 In 2004, Marvel Comics launched a new ongoing series titled Excalibur, this time dealing with the efforts of Professor Xavier and Magneto to rebuild the devastated mutant nation of Genosha (which was destroyed at the beginning of Grant Morrison's New X-Men).

Other cast members included Callisto, another mutant leader and former member of the Morlocks, and newcomers such as Wicked, Freakshow, Shola Inkosi, and Karima Shapandar. Archangel and Husk also appeared in the series. The grouping never laid claim to the name Excalibur, despite the title of the series. The series' last issue was #14, released in May, 2005. Events of the "House of M" storyline concluded Xavier's and Magneto's partnership. Afterward, the mutant members of the group showed up in the "Son of M" series, where it was revealed they had all lost their powers due to the "Decimation". However, they used Quicksilver's stolen Terrigen Mist to bring their powers back, which caused them to go out of control, but the effect wore off later, leaving them human. Ironically, issues of Uncanny X-Men during the time of this Excalibur had much in common with the original Excalibur: lighthearted stories by Chris Claremont, colorful art by Alan Davis and Mark Farmer, characters including Nightcrawler and Rachel Summers, and even a cameo appearance by Captain Britain.

+ Genoshan Excalibur Character Real name Active in Magneto Max "Magnus" Eisenhardt Excalibur, vol. 3 #2 (2004) Professor X Charles Francis Xavier Callisto Freakshow Wicked Karima Shapandar Excalibur, vol. 3 #4 (2004) Shola Inkose Book Excalibur, vol. 3 #8 (2004) Broadband Hub Excalibur, vol. 3 #9 (2004) Dark Beast Henry Philip McCoy (Earth-295) Excalibur, vol. 3 #10 (2004)

New Excalibur (2005–2007) The letters page of the final issue of Excalibur (vol. 3) announced a relaunch of the title as New Excalibur in November, 2005. This incarnation of the book was written by Claremont. New Excalibur has more in common with the original series than the Genosha-based book had, for it features Captain Britain and Peter Wisdom as main characters and takes place in London. Other characters include the reformed villain-turned-X-Man the Juggernaut, the former X-Women Sage and Dazzler, and Nocturne, formerly of the Exiles.

As with many of Marvel's late 2005 books, it spun out of the after-effects of "House of M". Four issues of Uncanny X-MenUncanny X-Men #462–465. Marvel Comics. laid the foundation for New Excalibur. Captain Britain brought the team together in New Excalibur #5, preceding an attack from Lionheart, Albion, and the Warwolves. Later, the team faced an attack by Black Air and Black Tom Cassidy, who was depowered due to "M-Day." Black Air retreated after the Dazzler, Wisdom, Nocturne, and Captain Britain trounced them. Black Tom surrendered after the Juggernaut talked him down and made him feel guilty about killing the Juggernaut's friend, Sammy Paré / Squidboy. Sage confronted the Dark Charles Xavier from Shadow-X in an astral fight, where Sage shot his astral form and won.

Psylocke joins New Excalibur and assisted them during an attack by the Shadow King, who was responsible for the creation of Shadow-X. Psylocke plunged a psi-blade into Dark Xavier, saved New Excalibur, and vanished in a flash of light. Captain Britain believes her to be dead, unaware that she has joined the Exiles. Since the incident with Psylocke, New Excalibur has met up with a repowered Chamber, visited and saved Camelot (while the Black Knight temporarily traveled with them), and have attempted to help the Juggernaut with some troubles stemming from his powers that he received from the Crimson Gem of Cyttorak. Nocturne had a stroke and the team is trying to help her recover.

Later on, Albion tells his story to Lionheart. He is a Brian Braddock from another world, where their first World War never ended and he chose the sword over the amulet. He brought his world peace, but people kept starving and dying. When he met an alternate Captain Britain, he moved onto the latter's world and from there began a killing spree on the Captain Britain Corps. He then meets Shadow-X and Michelle Scicluna, a Black Air agent, and they prepare to take on New Excalibur.New Excalibur #18. Marvel Comics. Rivalry sets them apart, though, and Sage infiltrates them as Diana Fox. Albion manages to take down all of England's energy-using objects and conquers it, with Sage developing a new persona subordinate to him. They kill both Dark Cyclops and Dark Beast, forcing New Excalibur and Shadow-X to ally to make what might be their last stand.New Excalibur #19–22. Marvel Comics. Dark Marvel Girl, Juggernaut, and Dark Angel create a diversion, at the cost of the latter's life, to allow the Dazzler, the Dark Iceman, and Pete Wisdom to combine their powers and blind all of the Captains while Nocturne, who has left the hospital while possessing a Captain's body, evacuates the civilians. Captain Britain arrives to face Albion and tries to bring Sage back to normal and the two Brian Braddocks prepare to face off.New Excalibur #23. Marvel Comics. Captain Britain then defeats Albion, as Dark Marvel Girl finds the device that Albion had used and is able to reactivate all of the technology in Great Britain.New Excalibur #24. Marvel Comics.

New Excalibur #24 was the final issue of this title, with the storylines carrying over into the crossover miniseries X-Men: Die by the Sword.

X-Men: Die by the Sword