Codex Entry: The Mask...

Within the darkest of hearts we the Black Templars have found an interesting curse, we call it 'The Mask'. 'The Mask' Is chiefly the Heathen of Pagan symbol of a Pentagram within the accursed' eye. The singular case we've found within the population of the God Emperor's dominion (and lived through rigorous testing...) Had tattooed his face to make it seem like 'The Mask' wasn't there, or was merely a contact lens. We found that 'The Mask' grants the Accursed' with powers of heresy beyond the anything any enemy of ours has ever been able to exert: Such as the power of Blasphemous Elements. We've also found that the Accursed' has extreme fortitude against poisons and pain, and resists death itself. When our study was finished, we killed the subject while losing ten of our finest men. We have one picture of 'The Mask' of which the natives cal 'Deathmask Divine' since many of the Accursed' have been revered as Gods where of  which they've hailed from. 

The Mask itself, taken from the eye of the patient, number 000091666.