[1] He served as the main antagonist of the 1985 DC Comics miniseries Crisis on Infinite Earths and later appears as an enemy to the Green Lantern Corps and the Justice League.

[4] He was believed to have been destroyed in Crisis on Infinite Earths #12 only to return after a long absence in Green Lantern: Sinestro Corps Special #1 (August 2007).

[citation needed] In a final revision, it was established that it increased entropy in the universe, shortening its existence by a billion years (see heat death).

[6] In more modern times, Pariah performed an experiment similar to the one Krona attempted long ago on a parallel Earth (this was changed later to an alternate world in the post-Crisis single universe).

Kal-L and Superboy-Prime were willing to resign themselves to their final fates, when Luthor revealed that he had created a "paradise dimension", and he used it to prevent the Lois Lane Kent of Earth-Two from being erased from existence when the Post-Crisis universe was formed, as he foresaw how events would unfold and refused to allow Superman to have to deal with such a terrible loss.

[12] Among the other beings who died because of his actions were the Crime Syndicate of America, Kid Psycho, Nighthawk, the Losers, Flower of Easy Company, Starman, the Immortal Man, the Dove, Kole, Clayface II, the Bug-Eyed Bandit, the Angle Man, Prince Ra-Man, Sunburst, Lori Lemaris, Aquagirl, Earth-2's Green Arrow, Huntress, Robin, and Alexander Luthor Sr. of Earth-Three.

Upon observing the events leading up to Infinite Crisis, the heroes returned to the universe in an attempt to restore Earth-Two's existence, at the expense of Earth-One.

[13] The Anti-Monitor’s remains were then recovered from deep space and used as the central component in the construction of a multiverse-tuning tower created by Alexander Luthor, similar to the ones used during the first Crisis.

[citation needed] Superboy-Prime (followed soon by Bart Allen) then returned from the Speed Force wearing what appeared to be select elements of the Anti-Monitor's armor, using it as a yellow sunlight collector.

[16] At the end of DC Comics' 2006 special Brave New World, it is revealed that there are five figures calling themselves "the Monitors" watching over the new post-Infinite Crisis Earth.

[19] His body was rebuilt by the Manhunters, and in addition, he recruited Superboy-Prime, the Cyborg Superman, and Parallax, who was using Kyle Rayner as its host, along with Sinestro as his heralds.

[citation needed] The cosmic tyrant stated that he would soon abandon Qward and that he would kill Henshaw for his services, allowing him the peace that had for so long evaded the Cyborg.

[21] When the Lost Lanterns made their way to the anti-matter universe to save Hal Jordan and the Ion power, they inadvertently stumbled upon the Anti-Monitor in a basement chamber of his stronghold on Qward.

[22] The Anti-Monitor's dying body crash-landed on a dark lifeless planet where a voice (later revealed to be Nekron) acknowledged him and told him to rise.

[citation needed] When the Black Central Power Battery is later brought to Earth, the Anti-Monitor stirs within, demanding to be let out, and begins draining Dove's energy to escape.

[25] The Anti-Monitor is eventually resurrected by a White Power Ring and breaks free of the battery, fighting Nekron in revenge for imprisoning him.

[37] Shortly afterward, he emerged from his shell changed into a more human-looking form, once again Mobius, but still possessing vast power and legions of Shadow Demons.

Even now, fighting Luthor as well as the Justice League and the Crime Syndicate, Mobius has the upper hand until Grail, Darkseid's daughter, appears with Steve Trevor in tow.

Now basically a living weapon under Grail's control, Trevor releases a tremendous blast of power against Mobius, reducing him to a skeleton.

After capturing Barry because his ability to traverse the multiverse unaided made him a dangerous variable, the Anti-Monitor created an anti-matter cannon that would destroy the then-five remaining Earths with a concentrated beam much faster than the wave of entropy he had originally unleashed.

The cannon was destroyed by the Flash when he escaped and forced the energies of the weapon's power source into itself, causing it to explode and Barry to disintegrate.

In addition to possessing vast size (varying from about nine feet to hundreds of meters tall), vastly superhuman strength, extraordinary durability (by the end of the Crisis series he was able to effortlessly withstand blows from Superman and even survived a blue star going supernova), the ability to project destructive bolts of energy, and greatly augmenting another being's powers (as he did with Psycho-Pirate, whose powers were increased to levels too much for him to handle), the Anti-Monitor also possessed reality-warping abilities, which he displayed by removing Psycho-Pirate's face.

The Anti-Monitor also commanded an army of Qwardians and shadow demons and had access to highly advanced technology capable of shifting, merging, or destroying entire universes.

When Earth's heroes followed him to the beginning of time, he then absorbed all of their power and energy; this made him strong enough to alter the creation of the universe until he was opposed by the Spectre.