Initiation

Threshold

Blood magick is dangerous. The sorcerer uses the power that lies within the physical substance that is blood, with the aim of shaping reality into what he or she wills. This requires enough force to impose one’s will upon the world, enough discipline to master the subtitles of arcane lore, and enough willfulness to utilize the potency of blood. A sorcerer who would tap into the power of blood must break free from social and cultural taboos in order to explore the full potential of magick.

Blood magick can be as flashy as one using it to siphon the life energies from others, curse them with disease, or cleanse and heal the self or others. Yet it can be subtle. Reshaping the world requires more than spectacle, it takes time, effort, and transformations of the fundamental patterns that reside deep in the essence of all things.  An accomplished sorcerer will understand the appropriate applications of both sorts. Blood magick aims to create a state of mastery over the self and the environment, to remove any barrier between desire and fulfillment.

High blood magic is magic that is enhanced with ritual and the use of blood. By using such essence the sorcerer is able to supercharge the act of ritual, which in turn empowers the spell, which has been brought about like any other spell. So the sorcerer is able to use his or her own maximum energy, the ritual boost, and the power residing with in the blood to exponentially compound the potency of any spell.  Spells of this nature are arduous and powerful, allowing those with sufficient discipline, patience, and power to achieve bewilderingly potent results.
Low blood magic is direct magick, the sorcerer’s intentions becoming results immediately and with little preparation. An adept might throw an offensive spell and use an aggressive hand gesture to provide some sympathetic component to her spell. The old adage of "like to like” for example, my blood is your blood. So there is a link between us through our blood, we are both human, so the sympathy is already there, no need for complex rituals the majority of the time. Thinking in this manner makes you able to cast quite effectively on anyone or anything, regardless of shielding or naturally occurring defenses.
Low blood magic, keep in mind that the low\high distinction exists only to differentiate from primarily ritual based and more direct magicks, operates on this sympathy principle. If one looks at unified field theory, or pantheism, or just the idea that all life shares a link and is part of a greater whole, then the connections will be made. In a way, one could call blood magic just a focused form of basic life magic. So a mage could use blood, any blood, to form the sympathetic connection to any other target. Of course the more similar the blood being used is to that of the target the more effective the spell will be.