1960s . After the
Kree's first encounter with humans, Captain Mar-Vell is sent to spy on Earth and decide if it is a threat to the Kree empire. After aiding humanity several times, Mar-Vell is found guilty of treason against the Kree Empire and sentenced to death by firing squad. Mar-Vell escapes in a stolen rocket, but becomes lost in space. After drifting for 112 days, he is weak and on the verge of madness. He is manipulated by
Ronan the Accuser and Kree Minister Zarek into helping them overthrow the
Supreme Intelligence. To better help them, Mar-Vell is given a new costume and enhanced abilities. After the conspiracy is foiled, Mar-Vell tries to return to Earth. On the way, he is hit by a blast of radiation and trapped in the
Negative Zone. The Supreme Intelligence enables Mar-Vell to telepathically contact
Rick Jones, which he uses to lead Jones to a set of "nega-bands" at an abandoned Kree base. When Jones puts on the bands and strikes them together, he trades places with Mar-Vell and is encased in a protective aura in the Negative Zone. The pair discover they are able to maintain telepathic contact. Using this method, Mar-Vell can remain in the positive universe for a period of three hours.
1970s . After brief encounters with the villain
Scorpio and the
Hulk, Jones uses
Mister Fantastic's portal to the
Negative Zone to free Mar-Vell, who becomes embroiled in the
Kree–Skrull War. As a result of the war, Jones is left near death and Mar-Vell re-merges with Jones to save his life. Mar-Vell's consciousness begins to resurface weeks later as Jones's body becomes unable to house both of their life energy. Photon ray treatments by Professor Savannah stabilizes the situation and brings Mar-Vell's body and consciousness to the surface. After battling the
atomic-powered
Megaton, Mar-Vell is trapped in the Negative Zone once again until released by Jones via the nega-bands. Mar-Vell aids the Avengers against the
Grim Reaper and the
Space Phantom. Mar-Vell allies with
Mentor and
Eros against the death worshipper
Thanos and his forces in a war for the
Cosmic Cube. Seeing the magnitude of the threat, the cosmic entity
Kronos aids them by creating
Drax the Destroyer, whose sole purpose is to kill Thanos. Another cosmic being,
Eon, transforms Mar-Vell into the "Protector of the Universe". This provides the hero with new abilities, including "cosmic awareness". Thanos gains the Cube and uses it to make himself omnipotent. Thanos' spirit leaves his body, and Mar-Vell uses the opportunity to shatter the Cube, which was still in Thanos' hand. This undoes Thanos's actions. Mar-Vell teams with
Spider-Man to battle the
Basilisk and later encounters a new villain named
Nitro. While defusing a bomb placed by Nitro, Mar-Vell is exposed to the
nerve gas Compound 13, but recovers after being given an
antidote. During this time, Mar-Vell has an encounter with
Living Laser. Mar-Vell investigates Nitro's allies, who are revealed to be the Kree "Lunatic Legion", leading to a series of protracted battles and the eventual trial of the cosmic entity
Uatu the
Watcher for constant involvement in Earth affairs. After ending the threat and aiding Uatu, Mar-Vell briefly separates from Jones and has an encounter with a space
parasite that assumes the form of former lover Una. Mar-Vell travels to the Kree homeworld of Hala, and through a protracted series of events that almost kills Rick Jones, frees himself from the manipulation of the Supreme Intelligence. During this period, Mar-Vell also encounters the cosmic entity the
Stranger. Returning to Earth, Mar-Vell encounters stranded Kree scientists who attempt to retrieve an inactive Kree Sentry located on the
S.H.I.E.L.D. Helicarrier. This proves unsuccessful when the Sentry activates but fails to follow direction, going on a rampage. A new villain called the Cheetah attempts to manipulate the Sentry, although both are eventually defeated by Mar-Vell. The hero locates the Kree scientists, and briefly battles Ronan the Accuser, who was left with the mind of a child after a previous encounter. Rick Jones is visiting
Avengers Mansion when the
Super-Adaptoid attacks. During a battle with the Avengers, Jones trades places with Mar-Vell, with the Super-Adaptoid eventually mimicking Mar-Vell's Nega-Bands. Mar-Vell then brings the Super-Adaptoid's bands together, exiling it to the Negative Zone and freeing Jones. Mar-Vell bids Jones farewell and encounters
Mercurio the 4-D Man, who tricks Mar-Vell into returning to his home dimension, hoping to coerce the hero into building the Omni-Wave Projector. Mar-Vell, however, defeats Mercurio and returns to Earth. Mar-Vell continues to have dealings with the Kree, preventing scientist
Doctor Minerva from killing Rick Jones and battling High Council member Phae-Dor before travelling to Hala and, with King of the
Inhumans Black Bolt as his ally, preventing the "War of the Three Galaxies" by exposing a Skrull infiltrator. After another encounter with Nitro, Mar-Vell briefly attempts to adopt the Walter Lawson identity once again and works at an observatory. This plan is abandoned when forced to become Mar-Vell to stop an energy
vampire named Deathgrip. After an encounter with
Thor, Mar-Vell is forced to fight off Drax, who has been driven insane due to being unable to fulfill his purpose and kill Thanos. Eventually convincing Drax to aid him, Mar-Vell enters into a war against
ISAAC, a sentient computer who served Thanos and now directs his forces. After a series of protracted battles, Mar-Vell convinces ISAAC's minion
Elysius to join him, causing her to fall in love with Mar-Vell; he subsequently defeats ISAAC's other pawns Chaos and Tarterus and the warrior Stellarax on Earth. Mar-Vell eventually defeats ISAAC by entering the supercomputer's programming and forcing it to experience life. Mar-Vell meets Eon once again and reflects on the events of recent times.
1980s ''
graphic novel (1982). Cover art by
Jim Starlin. After a battle in the
Dark Dimension, an encounter with the
Hulk, and an adventure on an alien world, Mar-Vell discovers that his past exposure to Compound 13 has given him cancer.
1990s When the
Silver Surfer visits the Realm of the Dead, he is counselled and aided in his escape by someone who appears to be Mar-Vell, but is later revealed to be a manifestation of the selfless heroic ideal that is part of the Surfer's own psyche. Mar-Vell's former lover Elysius also impregnates herself with his genetic information, giving birth to a son,
Genis-Vell.
2000s Visiting the Realm of the Dead, Genis encounters his father. He learns Elysius also gave birth to a girl,
Phyla-Vell. The
Young Avengers member
Hulkling is revealed to be the child of Mar-Vell and the Skrull princess
Anelle.
2010s During the "
Chaos War" event, Mar-Vell and several deceased members of the Avengers return from the dead. He takes leadership of the group, helping protect several civilians and the comatose bodies of the main Avengers from chaos demons. Mar-Vell is impaled from behind by the
Grim Reaper and is killed once more. Some time later, Kree mystics resurrect Mar-Vell using a piece of the
M'Kraan Crystal and a portion of the
Phoenix Force. Controlling his mind, they use Captain Marvel against the Avengers. Mar-Vell is freed by
Vision and sacrifices himself to save the Kree from the Phoenix Force, which threatens Hala while seeking to reclaim its missing energy. ==Powers and abilities==