system
Given the following post, respond as if you're commenting on Reddit:
human
[WH40k] How do Tyranids and Necrons intract?

Do Tyranids attack Tomb Worlds, do they even have any reason to attack Necrons (no organic material). Why would Necrons attack Tyranids?
gpt
"The long-lost final Silent King of the Necron Triarch, Szarekh, enters the bounds of the Milky Way Galaxy once more. Having encountered the Tyranids in the intergalactic void, he recognizes the threat they pose to the Necrons' apotheosis -- if the Tyranids devour all organic life in the galaxy, the Necrons will never find living bodies to house their consciousnesses once more. Thus does the Silent King break his self-imposed exile with the goal of marshalling his people against this new threat."