User blog comment:Abyssal Horror/Further help and ideas: Darkness Rising/@comment-9465750-20120528133052/@comment-5055812-20120529004121

What about Ynnead? You know, the last hope of the Eldar? He's basically like their saviour who comes to battle Slaanesh, and he's their God of the Dead!

How bout when all the Eldar die (because some Far Seers say that Ynnead will only have enough power to manifest itself when all the Eldar are dead) Ynnead comes and brings to pain to Slaanesh?

Cutting off the Warp from Materium is heavy stuff. Warhammer 40k revolves around the Warp. Removing the Warp is like removing Mordor from Lord of the Rings.