“In the room ahead is a spider artifact. Take it! We will need it to reach the Santieri Crystal.” Also “There is but one gift I can offer that is equal in value to an Elder Scroll and my daughter: I offer you my blood. Take it and you will walk as a lion among sheep, men will tremble at your approach, and you will never fear death again.”
Yeah, correct guess. In the game you kill the leader of the dominant religion (based on martyrdom and sacrifice) after they have refused to take action against the corruption in their own ranks, and allowed atrocities to be committed in the name of religion. Turns out (spoilers) that the head of the religion is also corrupt. Not really subtle, is it?