My BR DM and i are curently in progress to create a new prestige class for BR only (unleast there blood abilities in other campaing)

We manage to make some point clear

1- It as to be a scion
2- It available to all class
3- He must have a BAB of 8+
4- He gain "Blood mark" as soon he become a BH (Blood Hunter)

These are the bases we made we thought to add him misc abilities such as "blood smell" (Can detect a scion near) and such thing like that. And he have a greater possibilities to blood theft someone and we make sure that he have a greater chance to resist "Azrai blood coruption" (If i can say so)

If you have any more ideas about it plz post it here thx.