Hyperspace Oubliette
From Warhammer 40k - Lexicanum
Hyperspace Oubliettes are a type of Necron technology.[1]
These devices are used by Deathmarks to allow for them to access their own pocket dimension. From here, the Deathmark can observe the battlefield, and even tap into enemy transmissions, only to materialize and strike when they deem the opportunity to be right. To the lesser races of the galaxy, it seems as if they are teleporting.[2]
Sources
- 1: The Infinite and the Divine (Novel), Act 2, Chapter 1
- 2: Codex: Necrons (5th Edition), pg. 36