Of all the rules of Mythras,the chapter on Theism has the potential to provide the greatest contention, because it covers the topic of the player characters' religion.
Devotion is one of two non-mundane skills used by theists. The other skill, Exhort, is used to invoke Theistic Miracles.
But what exactly is Devotion about, anyway?
Holiness
Can people really measure someone's holiness by a number? Could a religion's Pontiff really throw down some badass righteous smiting from