Well, when I first saw this sub, I expected a quasi-evil religious group. What I got is alright, just not what I expected (No one expects the Surian Inquisition!). Like Pieh said, it's not really my cup-a-tea, but it is pretty good. Unfortunately, it seems a little incomplete. You have quite a bit of information about the history of the group (which you'll need here), but almost nothing about current times, and no plot hooks or ways of using this in the game. Overall, adequate, but could be bettered.
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The players encounter an organization dedicated to toppling tyrannous governments; both good and evil. Secretly, they are led by the twin daughters of Lucifer / The Lightbringer / (Generic Adversary God). These daughters have an appropriate set of divine or demonic powers, but strictly speaking, are not evil.