Question about Vampire Victims & Regeneration

[Varyon]

Originally Posted by Kesendeja

Here's another one I hope you can help me with. How many hit points will losing a pint of blood cost?

I explored some of that here, and ultimately decided the simplest way to handle it was to decouple blood from HP, tracking it and the effects of blood loss on their own.
EDIT: For BP-pint equivalency, every multiple of full BP corresponds to 5% of the character's total blood volume. For an HP 10 character, BP is 5, so each BP is 1% of their total blood volume. An average person has about 10 pints, so every 10 BP is 1 pint. It's up to you if a character with higher BP actually has more blood, or simply bleeds more slowly; if going with the latter interpretation, you may want to say such characters have more "concentrated" blood, such that 10 BP is equivalent to a pint (for purposes of transfusions, feeding vampires, etc), even if it actually takes up less volume (although for transfusions you may need to water it down a bit).

Originally Posted by Balor Patch

Losing 1 pint only feels like a couple of FP lost. On the other hand, an average person has 10 pints and no HT roll will keep them alive without blood, so from that viewpoint getting to -5xHP is 6 HP each. I have no idea if losing 4 pints would realistically trigger a death check.

For a typical person, losing 4 pints is a Class IV hemorrhage, which is fatal without immediate medical assistance. Due to the way blood loss works, you can't really work out a blood-to-HP equivalency. Unless you want to track blood separately (as I ultimately opted to in the linked thread), you're either looking at extreme HP loss for missing only 1 pint of blood (12 HP per pint for a typical person, such that 50% blood loss is instantly fatal) or some sort of ramping-up effect of blood loss (an option would be -1 HP for missing 1 pint, -3 for missing 2 pints, -10 for missing 3, -30 for 4, and -100 for 5).