[@White Feather]
Jacks surname: jack daggerswift (dat naim doe)

Dynasty:daggerswift(I guess)

invisibily limit:in the sunlight you can see a faint refraction where he is standing

Creature(I assume you mean the shadowlegs):they are the size of a wagon wheel,they are rather rare to spot,and even more rare to survive conflict with,they are mainly passive but if provoked will maul your flesh,(so can I actually add a part where he discovers the reason and way his blood was crossed with one!?)

He is sometimes driven by a bloodlust to kill but that is rare(his shadowleg blood)

How about only two dark spawn,when one dies he can replace it,but he would have to wait 120 seconds

Okay how does this sound
Positive traits:funny smart calm

Neutral traits:calm(it's a bit of both)

Negative traits:small bloodlust,sly,violent

What his shadowleg blood does to him

Bloodlust:after a while he will begin to grow a tad violent,which is when he would want to rip his enemies into pieces

Quiet:he tends to be a stealthy person

Sickness:occasionally his blood "argues"with his shadowleg blood,making him nauseous and sometimes cause him to get very,very tired and fall asleep,which would be when he were to get better

One more thing:can I make him have no family?if I can make the thing about his blood being crossed a plot then maybe I could weave a lack of family or memory of a family into it