Board Thread:Warhammer 40k General Discussion/@comment-25507520-20150422230011/@comment-6078851-20150425140003

i'm not overly familiar with the creation of ynnead but i think it requires every eldar to die, including the dark eldar (technically they're still eldar), and the eldar believe that the complete death of their race will 'birth' a new, posthumous, god. but as long as the dark eldar perpetuate their own existence ynnead can't be created. but as i say i'm not overly familiar with the creation of ynnead so i'm not sure if the dark eldar are also required to be dead.

but this is an eldar belief/legend, and while there's a decent chance of ynnead being born post-eldar, it could also amount to nothing and once the eldar die they'll just be dead with no god-of-the-dead to show for it :)