May even overlap with Tome of Eldritch Lorewhich is often written in man's blood on parchment made of human flesh. When it's used to create life, it's Fertile Blood. When the magic is used to extend the user's lifespan, it's Life Drinker. When it's the blood itself doing the damage, you have Bloody Murder. Frequently a part of any ritualistic Blood Bath. It is frequently the alternative to Necromancy as the 'evil magic'. Especially potent if it was her first period. This trope is Older Than Feudalismwith blood and sacrifice being powerful magic in some of the oldest tales.ДЄ very old Greek curse was for a witch to run three times around the house she wished to curse while menstruating. Except, of course, when it's the Menstrual Menace. The other side of the coin is menstrual blood, which is used much less frequently but is associated with life magic when it is used.

Sometimes only a single person's blood has power, and any other blood is powerless. Some blood may be indicated to be more powerful than others. Expect mages who practice Blood Magic to be portrayed as evilor at least dark greywith possible exceptions made for druidlike nature cults that may be considered amoral. It may be a token sacrifice, but it may also be the loss of life that fuels the spell. Spilling of blood is a potent force in the working of magic.

Blood magic complex spells