From publisher blurb:
Immortal Blood presents a new take on Vampires for Pathfinder 1st Edition. 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 revised edition improves on the fundamentals of the original system, stripping away the useless portions of it, and giving you a refined product. Includes new lore, new templates for different clans, new vampiric powers and feats, class archetypes and more!