I am Inquisitor Greymane of Celestia's Holy Inquisition.

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Probably not much of a faction, but Inquisitors can pull some scary ****, and I'm thinking there's some Heresy Macguffin on this world worth the Inquisiton's attention.

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... Plus, you know... If things get out of hand, I can EXTERMINATUS as a way to get everypony back on track. I'm used to playing really powerful characters in D&D, I know how to not abuse power, no worries.