[1] Multiple versions of his origin connect him to the villain Vandal Savage, with both gaining immortality by encountering a strange meteorite during prehistoric times.

The story introduces the hero as a member of an ancient race of prehistoric superhumans who is given a magical amulet by the tribal chief so he may continue fighting evil for eternity.

Following the DC Rebirth relaunch event in 2016, the Immortal Man is reintroduced in the comic book Dark Days: The Forge.

Found outside an orphanage, his caretaker finds a jeweled amulet around his neck and decides to keep it safe until the boy is older.

Wanting freedom and confused by his expert level knowledge in a variety of fields (such as bullfighting, Japanese Samurai culture, and culinary arts), he runs away.

After a few years, the now adult orphan returns to the orphanage to investigate his past and is finally given his jewel amulet, restoring his powers and memories.

Thanks to a magical amulet given to him by the tribe chief, he is tasked to protect people from evil throughout eternity by constantly reincarnating in different bodies, sometimes older, sometimes younger.

Over the millennia since, the Immortal Man has been a Babylonian, an Egyptian, a Greek, a Roman, a Carthaginian, an Arab, a European knight, a Mongol, and many others.

[6] The next story reveals that (following his death from the exploding boiler) the Immortal Man materializes as a clothed adult in an African jungle, the amulet around his neck.

After months of living as "Jungle Man", he meets a pair of explorers and treasure hunters, Helen Phelps and her brother Rodney.

The Immortal Man tries to protect them from a criminal named Karat who later uses a mystical artifact to bring a mythical beast to life.

[7] Reborn in America, the Immortal Man assumes the identity of "Jason Kirk" and coincidentally meets Helen Phelps again months later.

[9] Reintroduced in 1984, the Immortal Man no longer has super powers beyond his unique reincarnation and is given a revised origin (with further detail added in History of the DC Universe, The Flash (vol.

In the revised origin, the Immortal Man is born roughly 50,000 years ago as Klarn,[10] leader of the Bear Tribe.

[12] Throughout history, he fights to protect people from threats and repeatedly interferes with the schemes of Vandar Adg, who adopts the name Vandal Savage.

Realizing Vandal Savage has a means to corrupt Superman, the Immortal Man attempts to contact the Justice League but the team is away on a mission.

Rather than wait, he decides to deal with Savage's scheme and the mystery behind several strange golden pyramids by creating a team of "Forgotten Heroes", recruiting retired and semi-retired adventurers including: the Sea Devils, Cave Carson, Animal Man, Congo Bill, the time traveler Rip Hunter, Dolphin, and Rick Flag of the Suicide Squad.

No mention is made of Stefi's parents or if she was a child found and adopted, so it is also unclear if she was already alive before the Crisis, in which case she could not be Immortal Man.

Steffi Jones is never seen again, making it unclear if she died in the blast or was reborn in a new body afterward or was indeed the original Immortal Man after all.

In the 1990s, the comic series Resurrection Man reveals that the meteorite that empowered Vandar Adg and Klarn carried "tektites" (a form of nanite-based technology).

The meteorite was hurled through time by unknown agents, landing in what would become the Ardennes Forest 1.93 million years ago, during the Pleistocene Era.

His sister Kyra, who adopts the name Infinite Woman, argues humanity rises best through conquest or when forced to face an enemy.

The Immortal Man, fearing his sister will succeed in killing him, initially plans to transmit his mind into a new recruit, a teenage boy named Caden Park who has the ability to read another's memories ("mind-swipes").

In retaliation for the House of Conquest's actions, and to prevent them from achieving victory, the Immortal Men disables the technology keeping their battle unseen, forcing the world and the Justice League to see evidence of the Eternal War.

[22] In The Multiversity – The Society of Super-Heroes: Conquerors from the Counter-World #1 (2014), it is revealed that this version of Immortal Man is actually Anthro, who in DC Comics is often cited to be one of Earth's first homo sapiens.

He and Doc Fate's Society of Super-Heroes are Earth-20's last defense against an invasion by Earth-40, an evil counterpart to Earth-20 where Vandal Savage and Lady Shiva lead an army of villains.

Due to his many lives across thousands of years, the Immortal Man is an excellent tactician, skilled in various forms of combat and survival, and is knowledgeable in many fields of study.

In his four original 1960s stories, the Immortal Man's amulet also grants him psionic abilities such as pyrokinesis (creating and controlling nearby flame), limited telepathy (allowing animal communication and control over weaker willed minds), and limited telekinesis (allowing flight and reinforcing his physical strength).

While wearing the device known as "blood mask", Caden can access the skills and memories of all fallen Immortal Men of the House of Action.

In the shared Arrowverse of the CW network's DCTV shows, elements of Immortal Man's story are given to Hawkman and Hawkgirl as well as Rip Hunter, all of whom are sworn enemies of Vandal Savage in this version of events.