During the battle known as the
Infinity War, the
Magus (a manifestation of all the evil inherent in
Adam Warlock) visited the other-dimensional entity Anthropomorpho, director of the Manifestation race. The Manifestations are inorganic "fractual" beings, not truly living in the traditional sense, that would be altered into avatars or "M-bodies" for powerful and cosmic entities. For the Magus, Anthropomorpho engineered several Manifestations to become monstrous "
doppelgängers" of Earth's superheroes, creating a small army. Some of these doppelgangers made advance strikes on Earth's heroes, attempting to defeat and then merge with them, taking over the hero's identity. One such Doppelganger is a bloodthirsty, near-mindless duplicate of
Spider-Man. The Spider-Doppelganger confronts the hero in a battle that ends up involving Demogoblin and
Hobgoblin. Intending to kill Spider-Man, Hobgoblin unintentionally seems to kill the Spider-Doppelganger instead. After Spider-Man leaves to find help and information, Demogoblin revives the hero's monstrous double with supernatural energy. When the Magus is defeated, all his Manifestation troops are undone, except for Spider-Man's doppelgänger. Demogoblin recruits the surviving Doppelganger as his aid against Spider-Man and Hobgoblin, leading to the pair also encountering
Ghost Rider,
Blaze, the demonic Deathspawn, and Spider-Man's enemy
Venom. Separating from Demogoblin, the bestial Doppelganger eventually encounters the mass murderers Carnage and Shriek, the latter of whom adopts the creature as a loyal pet. Joined by Demogoblin and
Carrion, the group engages in a campaign of terror and murder. The creature comes to see Shriek as a mother and later defends her from attack by an enraged Carnage, who in turn delivers several fatal stab wounds to the Spider-Doppelganger before knocking it off a rooftop. The creature is seemingly killed on impact. . Doppelganger turns up alive years later, now capable of some speech and with an altered appearance, its form apparently still malleable since it is of the Manifestation race. Attempting to free Shriek, it fails and is seemingly killed again, only to then wake up on an autopsy table. After Shriek is finally freed from being held by authorities and the mental hospital
Ravencroft Institute, she and the Doppelganger wreak new havoc on New York. After a battle with the new symbiote
Scorn, the creature flees with Carnage. Carnage then overtakes a Colorado town with the Doppelganger's aid, but the creature flees when the villain is captured. The Spider-Doppelganger is shown among the Spiders assembled to help combat
Morlun and the other
Inheritors in the
Spider-Verse storyline. The creature eventually reunites with Carnage and Shriek when they form a cult dedicated to worshiping
Knull. ==Powers and abilities==