Choose the target province, where you would like to spread your religion to. It should be adjacent to the province with your religion. Claim your target out loud.
You need to pass the check 5 2 (draw 2 cubes from a check bag) in order to spread your religion to a province without religion that no one controls. Also take into account the complicating factors and the simplification factors that increase and decrease the number of cubes to draw by one.
Simplification factors:
The total sum of those factors define how many cubes you draw.
Take a bag or an upgraded bag according to the properties of your cards. You have the option to upgrade your starting bag for an extra cost. After upgrading, you will use the upgraded bag for each check attempt until you succeed or stop trying.
Pay 5 or discard 1 faith
and pass the check. If it's a success - go to the next step. If you fail - return the cubes back to the bag, and you can begin this step again (by paying coins) or quit. If you are not able to pass the check, put 1 action
in your city area of your player mat.
If you succeeded while passing the check, discard the token of foreign religion (if any) and put your religion token instead. Place your action cube on your new token.
In your turn, once chosen to spread the religion as your main action, you can spread it to several provinces, spending an action cube each time.
In rare cases, when you have chosen a complicated province to spread your religion at and you quit after several attempts, you still can choose another target province and start the procedure once again, spending another action cube.