The Illuminant Order (also called the Church of the Illuminant) is a collection of knights sworn to eliminate fiendish pacts, devil worship, and communion with beings from the far realm for purposes of power.
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The order believes that power achieved dishonestly corrupts and its spread cannot be controlled. It is not enough to punish those who seek out power, they must be brought to heel and all those who would lionize them must be made to understand the folly of cutting corners.