[Graeme Dice]

Originally posted by Boron:
but on large maps it will become harder and harder to keep the blood flowing .

On a map with twice as many provinces, you will likely have twice as many provinces yourself to bloodhunt in. Your opponent has to be able to cover most, or all of them to be able to disrupt your blood income significantly. Add to this the soul contracts you will likely have built which provide a nearly permanent blood slave income. It's very difficuly to disrupt a person's blood income to any significant extent when they happen to have 20 or more provinces that they are hunting in.

if someone casts something like utterdark and can it keep up it will be evil for you

This is true no matter which nation you are, unless you happen to be Ermor, and in that case, you were probably the one who cast it.