unfathomable being of limitless imagination, the original Monitor, or Overmonitor, became aware of the life germinating in the budding Multiverse, occupying the void space in which he resided and which he encompassed. Curious about it and wanting to interact with and know better the lesser life-forms birthed by the Multiverse, he fashioned a probe, a smaller Monitor. Unprepared to deal with the complexity of life and the passing of time, the probe-Monitor was instantly split into two symmetrical, opposite beings upon coming into contact with the Multiverse itself: the Monitor, embodying the positive matter and goodness, and the Anti-Monitor, embodying anti-matter and evil. The Anti-Monitor, who appears monstrous, barely resembles the Monitor, who bears a physically near-human appearance. The Anti-Monitor has empty, sometimes luminous eye sockets, and a wide, wrinkled mouth, often mistaken for a mass of teeth. When his armor is destroyed by Supergirl, his form appears not dissimilar to that of the Monitor, but unstable, and surrounded by a coruscating aura of radiant energy—his life force, leaking out like water from a failing vessel, explaining the need for the armor. The Anti-Monitor himself refers to the armor as his "Life Shell". When the Manhunters re-build his armor, it is revealed his body is little more than a churning mass of energy. Much later, when his helmet is disintegrated by Firestorm, the Anti-Monitor's head is revealed to be featureless except for his eyes and mouth. Crisis on Infinite Earths In more modern times, the being known as 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). This experiment resulted in the reawakening of both the Monitor and the Anti-Monitor and the destruction of Pariah's Earth and his universe. The Anti-Monitor rebuilt his army, taking over Qward and using the Thunderers as his own private army, as well as creating the Shadow Demons from the elite of the Thunderers. The Anti-Monitor then released a massive anti-matter wave, absorbing the energies of the destroyed positive matter universes and growing stronger even as his counterpart grew weaker, and employed the second Psycho-Pirate, using his emotion control powers to terrorize the populations of the planets he sought to conquer and destroy. The Monitor, along with his aide Harbinger, gathered a group of heroes and villains from various alternate universes to combat the threat