Has anybody else done this? I don't do it regularly, but have used blood in both Solomonic evocation rituals, and servitor creation. I've also fed blood to a Nec spirit, in return for it's services.
What's the consensus on this, and how specifically do you use blood in your rites? Or do you use something else? Urine, seminal fluid, shit, menses, what?
Let's discuss!