Okay then. How about this. Each Religion is its own tech available upon AGE OF THE STARS.
Religion Techs:
- Light of the Valar (Enables the Religion, Appears in Capital City if adopted, Can Build Temple)
- Runes of Aulë (Enables the Religion, Appears in Capital City if adopted, Can build Temple)
- Worship of the Shadow (Enables the Religion, Appears in Capital City if adopted, Can build Temple)
- Inquisition (Inquisitor National Unit: 3)
A Further Idea:
I am thinking we should attach 1 single building to each. A Temple (Temple of the Valar, Temple of Aulë, Temple of the Shadow) that grants +1 Happiness, +1 Production & +1 Culture. That activates the Religion in that city. However, you can only build the Temple upon switching to the proper Religion. Also, though you may in the end have multiple Temples in a city, you only gain the bonuses from the one corresponding to your current Religion.
The Temple is how you acitvely spread your Religion. Passive spreading still takes place through normal means.
Having the Religion present in your city without the Temple grants you a +1 Happiness (If it is your current state religion). Thus, with a Temple in your City, you would have a total of +2 Happiness, +1 Production & +1 Culture.
We could also use the Inquisition Mod but change it so you can only use the Inquisitor Unit within your own Cities. If we do this, we could give a -1 Happiness per non State Religion in your city if you have a State Religion. You gain no benefits and incure no penalties if you have no State Religion.