Does anyone know how far back "Blood History" takes you? Several generations back (fixed number, variable?)? Back to the Battle of Mount Deismaar? Back to the beginning of the line (before or after the aforementioned Battle)? Back to the creation of the world (of which we have precious little information)? What if blood is invested/divested/stolen outside the family? Will the recipient remember the original family or his/her own? Does one remember both sides of the family? Does one remember both sides of both sides of his family? Is there a maximum number of people whose memory can be carried by one person?

What would you, as DM, do if, when confronted with a dilemma or trouble, a player asks: "And none of my ancestors ever encountered a similar problem? Ever?" wanting you to give him the answer, I mean there's a reasonable limit to how many times a DM can say: "This is a problem that has never ever arisen to any of your many ancestors, who cover half the noble lines in Anuire and some in Brechtur"...