Not sure if this would be categorized under plot development or research. Skip to the last paragraph if you don't want a rant on how a plot point in my story will work. I've put in bold the research part of my thread. In my fantasy novel(s) i am writing, a form of magic that is used by some people is blood magic, but maybe not in the traditional sense. Hopefully, the certain type of blood magic i am going to be using is quite literal. A skilled user of this magic and control their blood, and an even more powerful mage can control other people's blood. For example: A character in my story is able to magically displace the blood in her body to someplace else nearby, and using magic she can "teleport" to where her blood is now. For the most part, the blood moving is instantaneous, but if it were to travel a significant distance it would mean my character would be without any blood whatsoever for a decent amount of time. Another example is rapid healing; if my character were injured, she would be able to bring a large amount of blood to the wound in order to clot it faster, not exactly healing it, but stopping blood from pouring out of her body. Perhaps an even more advanced magician could control the blood in another persons body and therefore control their limbs. I am planning on having the drawback be loss of blood. The more magic used in a certain time, the more the effects are apparent. If my character were to repeatedly drain all the blood out of her body and put it back in, or repeatedly send most of her blood to a certain area, that would be bad. If a magician were to fall unconscious due to blood loss, their magic would stop working and the blood in their body would return to normal. The gist of it is being able to control the blood flow in their body, not just with blood vessels but magically as well. The real question is how long would a person be able to have no blood in their body. I assume no longer than 6-8 seconds (based on my knowledge of martial arts chokes) but can it vary, or would the body just instantly shut down if no blood were there. It's not like the blood will be gone forever; within a few seconds the blood in their body would return to normal. Temporary displacement of blood is probably the word i would use to describe it.