From publisher blurb:
Evil paladins... strong champions of a vicious and sinful goddess...
Powerful PCs? YES!
In the wicked pages of this book you'll find twenty new powers (dark and evil powers, not like the ones you already know!) that can be used for building your evil paladin, a faithful servant of Mhethser, the Black Princess, the new evil goddess described in this supplement.
What? You want to use them for your already-existing anti-paladin or dark guard?
The new powers of this book can be used with any evil-aligned paladin.
And yes... also included a free set of power-cards for quick reference during play!