system
A chat on 4chan
human
I'm splitting life leeching and Vampirism for the sake of convenience, they're both called Vampirism in most cases. Life-leeching is being a spiritual vampire, you're draining the life out of others. If this is done to a large enough extent, they'll start to die. This sometimes happens in romance, a partner takes love and gives none back, draining the other. People often think that's the end of it, but in reality it's giving the drainer the life of the other. The real issue is, to obtain regeneration of the type you mean, you'd need to basically be a cult leader, which is probably out of the cards for anyone here.
Vampirism is being a Vampire, self-explanatory. They exist, obviously, but you'd need to have one willingly convert you. How you'd do this I can't say, and there are drawbacks so severe that it's not really advisable. No control of soul, subservience to whoever converted you, weak to holy shit, ect.

Nanomachines are fed shit, you aren't getting your hands on that unless you know something we don't. Dynasty is referring to your dynasty, that of your parents and their parents and so on. Some families pass down certain supernatural traits, for example, good night vision. Ancient powerful families aren't just rich, they often have ancient and powerful blood.
Artifacts is referring largely to ancient magical shit, but any magical item could fit any purpose, provided it's strong enough. The vast majority of those who say they can enchant an item are lying, so you're best off checking out occult shops and looking for items that 'feel weird'. If you feel something fucky while touching or looking at it, it's magic or you being an autist, one of the two. The next step is figuring out what the object does, but that's for after the fact.
gpt
Fascinating. So I'm guessing that since vampirism and nanomachines are out of my reach for the most part, then hereditary traits and enchanted items are my choices. 

I suppose that if my blood line had any interesting traits I would already know about them, so that's out of the picture. 

Any other advice in regards to the special items?
human
A few. If you're friends with anyone religious who's useful, that can help. Dirty priests, gypsies, Imams, whoever would be willing to talk about it. More likely to work, ask your family about the supernatural, if they've had any experiences. After the conversations take notes (not during the conversations obviously), see if there's anything to go off of. Explore abandoned houses, talk to a monk, go indawoods, ect.
Bluntly, not much else other than finding something will be useful to somebody with your level of knowhow. I'd say lurk more but this board is shit now, not much to see. Research on your own path, check out /occ/, and good luck anon.
gpt
Alright, thank you Anon. May I ask, what is /occ/?
human
A misremembering of /omg/, the occult thread. 
gpt
Thanks bro