You can change every single Tenet and Doctrine of your hypothetical new Faith on this screen, though the list of what Tenets are available to pick varies from Religion to Religion. For example, Tenets based on the concept of Dharma are exclusive to Oriental Religions, whereas Monasticism was common practice and is thus available to everyone. This means when creating a new Faith, you must first ensure you are a member of the Religion that you want to base your new Faith off of.

Beyond simple availability, it is also easier for some Religions to accept certain Doctrines than others. For example, Islam is used to polyamory and will happily accept a new Faith espousing it. In contrast, a new Christian faith that claims God intended us to have multiple spouses will be met with a little more skepticism…

The way this plays out in CK3 is that each Tenet and Doctrine has a Piety cost associated with it. The further you deviate from your original Faith, the more Piety you will need in order to convince the priests that yes, you actually have had a vision from the divine and yes, you actually are enforcing their will and not just trying to make some weird personal sex cult.



[Screenshot of the scaling costs for the Cosanguinity Doctrine]

After you have made all the changes you want, you will be given the total amount of Piety your character needs in order to create their new Faith. This cost can get quite high, meaning that creating a new Faith or reforming a pagan one ends up being a life-long goal for most characters. It is highly recommended to attempt this with characters who have a Learning education and/or who have multiple Virtuous personality traits, and having the ability to go on frequent pilgrimages or donate gold & troops to holy causes helps too! Finally, timing your divine revelation to completely coincidentally occur when your Faith is suffering from low Fervor will make it much easier to get everyone to buy into your new canon (I will talk more about Fervor in our future Dev Diary on heresy outbreaks).

Once you are happy with your Tenets and Doctrines and have accumulated the necessary amount of Piety, you can officially convert to your new Faith. You and your capital county will adopt it immediately, but it won’t be easy for a ruler to convince their vassals and subjects to adopt this strange new Faith — they might be more inclined to stage an uprising and depose their mad king from the throne! After all, if you die before your new Faith gains a foothold in the world, there is a good chance your Faith will die with you…

Pagan Reformation

Pagan Faiths in Crusader Kings III start out with the special ‘Unreformed’ Doctrine.

This Doctrine grants notable bonuses to Tribal rulers early on, but it locks them into the Tribal government type and provides substantial Opinion penalties to any non-Tribal vassals they acquire. Since Tribal realms are notoriously unstable, successful chieftains will eventually want to look into either converting to a reformed religion so they can feudalize, or reforming their pagan religion into a true organized faith.

Like with Faith Creation, rulers must earn a substantial amount of Piety to organize their Faith’s disparate shamans into a coherent clergy. In addition, they must have at least 3 of their Faith’s holy sites located within their realm.



[Screenshot showing 3 of the Vidilist Holy Sites]

Once you accomplish this, the process is quite similar to creating a new Faith of an existing reformed Religion. Your vassals may still be reluctant to convert to your newly reformed Faith, but because reformed Faiths gain a bonus to conversion against unreformed Faiths, you will have a much easier time convincing them to go along with your reformation than a heresiarch within in an existing Faith would have with making a new heresy.

[Screenshot showing a Vidilist reformation event]

Tenet and Doctrine teaser

To finish this off, here are a few choice tenets and doctrines which you can pick when creating a new Faith in CK3. Many of these are also used by already existing Faiths, but some are only available to custom Faiths created by players. As you can see, there is a lot of variety in the kinds of custom Faiths you can create — ultimately every kind of playstyle should have some set of Tenets and Doctrines to support it!

[Screenshot of the Tenets Warmonger, Human Sacrifice, Ritual Cannibalism, Christian Syncretism, Dharmic Pacifism, Carnal Exaltation, Divine Marriage, Sacred Childbirth, and the Doctrines Pluralism and Fundamentalist]

That is all I have for you this week, but join us next time as my colleague @Heptopus talks about the diversity across the world in CK3 and the many different ways you can tailor the game experience to match your personal preferences!