I know you can, but I'll be opening my wrist to do it. I don't want anything to be a surprise. Genya is either going to have to be present when I craft it or provide me with some blood - a standard vial should be enough. And she needs to know the procedure when it comes to visitors. [Which could be a problem when it came to spur of the moment zadza sessions.]

How often are you going to want the wards refreshed?