Vampires...here is a rundown of what I'm going for...yeah, not great at the organizing, nor the explaining.

Purebloods - the living, breathing, original race of powerful vampires. These vampires can reproduce like humans, and can have pureblooded children with other purebloods or even half bloods. Children made with humans are always half blooded, they can't turn others into purebloods, though they can turn human into impure bloods. This race is are as strong as demons, though with all of their own usual weaknesses, save for sunlight...sunlight does make them as weak as a human, though.

Half Blood - born from one vampire and one human parent, and are capable of producing purebloods by pureblood partners. They are incapable of turning others into half bloods. Half the strengths of the purebloods, with little to none of the weaknesses. Sunlight is no bother to them, and they can actually drink from purebloods or even impure bloods.

Impure Bloods - turned, undead beings...cursed by a corruption made from pureblood. Can't reproduce at all, as they're undead, though they can turn as many humans as they like into other impure bloods...can eventually become as strong as a pureblood, but never quite as powerful. They cannot go out into sunlight at all, or else they'll be reduced to ash.