Acredito que você esteja procurando o " Requiem em estrela "
Editado do prefácio do quarto livro, " Labirinto dos mundos ":
Man once ruled over an Empire that stretched throughout countless worlds, worlds that formed a complex cycle, a self-contained chain.
In his hunger for knowledge, Man unlocked the door to another realm, that of the alien race, the Csendook, and thus began a thousand year war in which these ferocious aliens, faster and stronger than Man, began the inexorable conquest of his Empire.
In desperation, facing extinction, Man's Imperator Elect and his Consulate sought to escape the Csendook tide. On the world of Eannor, the Imperator's Prime Consul and the principal scientist, Zellorian, used dark and forbidden powers to create a gate into a separate cycle of worlds, a feat thought to be impossible. Zellorian brought the Imperator Elect, his remaining Consulate and the last of Man's army through to the world of Innasmorn, the Mother of Storms.
Innasmorn is a world of elemental forces, where the storms are worshipped as gods by its inhabitants. They, who are themselves partly elemental, have no use for technology and have almost completely outlawed the use of metals. When they learn of the arrival of the intruders, the Men of the Imperator, they begin preparations for war.
A small group of Innasmorians under Ussemitus, a woodsman, search for a forbidden land far in the west of Innasmorn, which is said to contain ancient powers. They fear that Zellorian will seek out these powers and attempt to harness them in his new thirst for control.
[Elsewhere] Aurangzar, now Supreme Sanguinary of the Csendook, is obsessed with the belief that the Imperator Elect is still alive. He sends one of his loyal commanders, Vorenzar, on the trail of the Imperator...
A parte em que uma "festa de caça" Csendook entra em um dos portais:
Using an Opener, one of the Csendook sub-races bred for the creating of gates between worlds, Vorenzar finds a way through to Innasmorn.
Em outro ponto da história, o cônsul é enviado pelo portão:
Zellorian sends Pyramors back to Eannor in exchange for the safety of his rebels. As he travels through the gate between world cycles, Pyramors meets an Accrual, a parasitic being that feeds on the blood and sacrifices that create gates. The Accrual promises Pyramors a return to Innasmorn if he aquires sacrifces for it.
Você também pode ler os capítulos iniciais do livro aqui .
Nota : existem semelhanças entre esta série e as do próprio autor " Blood Red Angel " que foi publicado mais tarde. Em vez de uma raça alienígena, a classe dominante nesse livro são humanos altamente evoluídos, chamados "Lightbenders". Mas eles são cruéis da mesma forma. Eles usam seus portais para caçar e coletar alimentos, incluindo espécies humanas.