In the Marvel Universe, the Deviants are the end product of a series of DNA tests known as Homo descendus, created by the enigmatic alien Celestials.

They are an offshoot of the evolutionary process that created sentient life on Earth instigated by the alien Celestials, and wage war against their counterparts, the Eternals.

[2] In the advent of the heroic age, Brother Tode was leading the Deviants, with his capital in the city of the Toads in the sunken continent of Lemuria.

[5] Later, the Deviants' aristocracy, led by Brother Tode, attacked Olympia and kidnapped the Eternals with the intent to disintegrate them.

[citation needed] Without the aristocracy, the Deviants' priests seized power, led by Priestlord Ghaur, who killed the son of Tode, Ranar.

[8] Ghaur returned to corporeal form and tried to obtain the Serpent Crown with help of the Atlantean Lemurians, led by Llyra, in an attempt to invoke the Old God Set.

First, a warlord called Brutus tried to conquer the different races of the subterrain, but was killed when the Deviants discovered his mutate origin.

[12] Ghaur (in a form of a giant statue) and the Deviants fought the Eternals and the Heroes for Hire, when the mad priest created an Anti-Mind in his plan to rule the world.

[14][15] Much later, the Deviant males were rendered sterile by a plague, the anarchy reigned, and a power contest between Ereshkigal and Ghaur happened.

Delta Network members included: Ransak the Reject, Karkas, Enigmo, and Donald and Deborah Ritter (the twin children of Thena and Kro).

[86] They are a monstrous race of near-immortal beings genetically engineered by the Celestials and are the historical enemies of the Eternals, their racial cousins.