Because of this utilization of the spark of life found in all living creatures, it is considered evil and has been cast out of normal use. The more arcane magics use the life force of objects and creatures.
There are several addons available for Blood Magic, for example Sanguimancy which focused around automation and some even darker forms of magic, such as Soul Corruption. Blood Magic has even more capabilities if Technomancy and Thaumcraft 4 are installed. In Blood Magic, you collect Life Essence by sacrificing your own health or the health of mobs that can be used to power your Blood Magic creations on your quest to become an Archmage. This mod adds an expansive life-based magic system which spans rituals, sacrifices, summoning, alchemy and spell creation. Whether it’s a sacrifice you take from yourself or from a mob, the power is in your hands to control your world in aspects you hadn’t considered before.