From the blog "The Aksha'i Cruentes - A World Eaters Crusade Blog"

This is something I've been wanting to do since the start of the year: the Aksha'i Cruentes are embarking on the Path of the Righteous.   Now that I'm comfortable with the Crusade rules in the CSM codex, I feel like this is a logical and characterful step for the Cruentes. They've always been a zealous bunch, and now with the death of Bardûl and the rising star of Kratus, I think it's a good time to start folding these rules into my army. Baruda is clearly pushing more of his influence