Dragon Age: Origins · Mage specialization
Blood Mage
Blood Mage adds constitution and spellpower and converts life into mana, allowing command over minds at a stated health cost.
How it works
The specialization grants +2 constitution and +2 spellpower. Its description says blood magic converts life into mana and gives the mage command over others' minds; it also states that the mage must sacrifice their own health or allies' health to fuel these abilities. In Origins it unlocks through a specific Arl of Redcliffe Fade event for a mage Warden. Spending a specialization point is separately required to use it.
Read the supporting references
Check the edition and source version for patch-specific details. Guide methodology.