Blood Magic
From Absit Omen Lexicon
Blood magic is strictly illegal in the UK and in many parts of the world; in some areas, it's not strictly forbidden but definitely a grey area. It requires a small amount of the victim's blood.
Uses of Blood Magic
Simulacrum
A simulacrum is a small figurine or likeness of the target, created with alchemy and imbued with blood. This allows the blood magic user to affect their target from a distance. You can affect their body temperature by throwing it in the flames, or by freezing it. It is difficult to kill people with a simulacrum, but it has happened. Torture is the most common use. If caught with an active simulacrum, you can be sent to Azkaban even if it hasn't been used.
