User blog comment:Khalael/Canon Policy Discussion 1: Space Marines/@comment-2253300-20131106083600/@comment-3258762-20131106095436

Blood Scars: Bikers with Jump Packs on their bikes.

But I have a hypothetical question: What about chimeric Chapters that died out soon after their founding? Maybe because of the gene-seed not working properly, maybe from extensive loss etc. Should that be allowed to show the risks of unstable gene-seed mixing?