I feel like that's definitely within my ability to do. i mean what are vampire without bloodline traits lol. my main concern would just be about the depth of the seals placed on him and the other elders because you stated that they also have powerful special seals on them as well, correct?
i mean outside of an enriched and more full world building unless you plan on unsealing them eventually will and using every clan, do you need detailed information for all the bloodlines? i mean hell after being sealed for so long, and there being only one Dracula left, who is to say that the bloodlines didn't mutate? like a fire bloodline that could remove poison ended up becoming a poisonous yin fire bloodline from being sealed and having so much pent up rage and frustration?
mmm.. sorry i digress, all i can say is that there is a lot of room for anything to happen in your novel lol. one of the reasons vampires tend to be hunted in my novels is because their blood can be used like a potion and when mixed with herbs there are near no side affects. because of that many other races hunt them down and lock them away to farm them.
until i have a more clear understanding of why your (powerful AF) vampires where locked away i wont be sure the best way to pitch ideas hahaha. you just say what you're thinking and i'll just dump info or lore in your direction lol just let me know