Publisher's blurb:
Deconstructing the template, Immortal Blood introduces a new system for vampiric progression. Now, a whole new Crimson Kindred template tracks the power of individual vampires by giving each a seventh ability score...the Blood Ability Score.
This ability score increases as the Vampire feeds off of powerful opponents or other vampires with higher blood scores. As this blood score increases so does the Vampire's abilities, granting him new bonuses to all character facets, as well as new vampiric powers and feats. Many of these powers and feats are based off of the original template, but others are wholly new to the system.
This system is designed to be used in any Vampire-Centric PF campaign, but was also designed specifically for the upcoming 'Legacy of the Ebon Tower' adventure path, a new adventure path in the Aedrenar Campaign Setting!