[@CrabInATree]

The only logic you honestly need to apply to Blood, is that whatever you're going to do with it, if you're using your own blood, you have to be careful not to lose it. And you have also only got about... a big punchbowl's worth of blood in your body, so you don't want to kill yourself right? If you ask me, how I personally would use Blood, it's much more based on external sources of blood. IE; other people. I have a Blood nurse so whenever I see fit to include her, I'll show off some of her abilities.