Dominions 4 takes a unique approach to the 4x strategy genre. It involves bringing forth your Pretender, which is much similar to a god or demigod. You also need to have an enormous army to accompany your false prophet to help spread his word.
As you conquer the neighboring provinces and continue to build your army, word will spread throughout the land about your Pretender. By building shrines and other artifacts, you will attract additional followers. The more you accomplish in the name of your Pretender, the more people will begin to take notice and follow him.