You may be looking for the God-Emperor from the game Warhammer 40,000.
God Emperor of Dune is a science fiction novel by Frank Herbert published in 1981, the fourth in the Dune series.
3,500 years have passed since Paul Atreides became the messiah of the Fremen and the Emperor of the universe. His son, Leto Atreides II, sees the path that his father Muad'Dib also saw, a future that secures the continuation of human life throughout the universe. That future, however, requires an aberrant act of selflessness: becoming a hybrid of man and sandworm. Leto II accepts this mantle of godhead from the Fremen and transforms himself into a monster of the desert, a sandworm, that will dominate the ecology of the planet Arrakis (known as Dune) for millennia. This is an act his father had been unwilling to do. Leto essentially accepts the terrible price of saving humanity which his father rejected. The novel records Leto II's attempts to consummate the Golden Path, which delivers the volition of humanity by scattering it beyond the perceived safety of Imperium's known universe, and also by destroying the possibility of the Imperium's control by any single entity, including himself.
Stylistically, the novel is permeated by quotations from, and speeches by its main character, Leto, to a degree unseen in any of the other Dune novels. In part, this stylistic shift is an artifact of how Herbert wrote it: the first draft was written almost entirely in the First-person narrative voice, only being revised in later drafts to insert more third-person narration of events.

Notable parody

Touponce, William F. (1988), Frank Herbert, Boston, Massachusetts: Twayne Publishers imprint, G. K. Hall & Co, ISBN 0-8057-7514-5; PS3558.E63Z89