Power of Blood is a series of special abilities enabled by the Warden's Keep downloadable content for Dragon Age: Origins. There are two for each base class (warrior, rogue and mage). Due to their obvious use of blood, Power of Blood abilities could be considered a type of blood magic. Unlike general blood magic, however, these powers are not derived directly from demons. Avernus notes that the demons are the usual source of blood magic—therefore he developed the abilities in his quest to find something that the demons could not match, namely the darkspawn taint in the blood of Grey Wardens.