Soooo, nice post. I do have a few comments and critiques.

Maybe don't just say you'll offer an explanation, just... give one. Like, don't just ask for blood and end it at that. Literally nothing sounds more nefarious than that, except maybe asking for newborn kitten blood.

Second of all, the fact that you apparently have extensive knowledge of the methods of bloodletting probably isn't something to broadcast to the entire team. Just, like, as a tip for the future. That's vaguely murder-y.