Greetings, fellow players.
I've been a loyalist pre-Heresy marines ever since I read HH books, especially "Galaxy in Flames" some time ago.
Recently, I've read the fluff section about the Deathwatch book describing "Black Shields," which is something like "I'll fight for you as long as I live if you don't question about me." (reminds me of the "Nightwatch" in the Song of Ice and Fire series). And I thought "Oh my, how should I make pre-heresy marines."
pre-Heresy marines have walked and fought with the Primarch(s), and possibly even with the Emperor, and actually saw how they acted (unlike almost-mythified version of story which present Marines hear). They acted based on the Imperial Truth (cold logic, there-is-no-god-ish idea, everything-can-be-explained-by-science, etc) that is quite different from present Imperial doctrine...and other interesting concepts which I can't think of all right now.
Well, I think it will be a great and unique opporunity to RP pre-heresy marines in present 40k universe. Little-different point of view from present marines (more rational?), How they act when they meet their 10000-years old "bretheren" they fought together as the Emperor's warrior before, "I know that guy" like moment when the kill-team is researching about the things from the past, and gradually telling the secret as they become to trust his "new" bretherens...
Problem is, I can't really make the fluff about "How did they survive 10000 years," "What were they doing for that time," and "how did they found about this Black Shield" - kind of fluffs that's good enough to convince my GM. I would have to device Black Shield's Chapter Traits and Demeanour later too...
Can any fellow players advice me? Well you can laugh at my crazy idea, but any thoughts (better if its possitive) are appreciated

