Zantragora

Zantragora is an Ultima Necron tomb world whose lords want their flesh back, a Cryptek laboratory planet also spelled Zantragorra. Illuminor Szeras's conclave uses it as a live-sample farm, not as a sleepy tomb that stayed asleep.

Legions and fleets raid for captives, then spend those captives on slow apotheosis experiments under the crust. Zantragora is not a Craftworld, not Commorragh, and not a random xenos zoo. It is a tomb that decided biotransference was a mistake worth repeating on other people.

Zantragora still matters as Szeras's named butcher-world. Unofficial fan summaries keep the Ultima parent, keep the Zantragorra alias, and do not file this pin as a Dark Eldar city or as a Craftworld.