One of my players wants to make a Black Shield Librarian and say he was from The Thousand Sons Chapter before the heresy and that is why he is a BS. From reading the A Thousand Sons novel I know that the Thousand Sons seconded their marines to other chapters to learn from them. Could this character have been with another chapter at the time of the heresy and proven his loyalty to the Emprah to the chapter? Thus making it possible to be a BS for the deathwatch to try to earn redemption for what his chapter did? The character wants to take the Gene-Seed Anomaly Deed because of the Flesh Change that happens in TS. And start him with insanity and some corruption. Also possibly giving him the Endless Redemption insanity thing. Seeing as how he has no chapter to return to he can never really succeed in his redemption and return home. Thoughts?
Thanks,
Austin