Blood magic consumes blood, right?
Not necessarily. Life-energy is the mystic force behind blood magic. When casting blood magic, the caster either taps the life-energies stored in his own blood, or uses his blood to filter life-energies being drained from another source. Blood loss depends on the way the caster uses his blood: • The life-energy in the blood is consumed directly while still inside the body; consuming the blood as well. (The blood vanishes, it is lost.) • The life-energy within the blood is left untapped. The caster’s blood is used to filter energy flowing into the caster from another source. (There is no blood loss.) • The caster cuts himself, the blood spilling upon the ground or the object to be empowered. (Being spilt, the blood is lost.