You are able to craft Servitor Souls within your Sanctuary as well as Vessels shaped from your domain, A vessel is required for a servitor soul to act physically in the world. Vessels are any kind of physical form designed to anchor the Servitor soul outside of your sanctuary, in the same way, your avatar does for you. Your theurgical systems can now include your Servitors in various capacities as well.
The physical capabilities of a vessel is determined by your own strength, and as your own divine power grows you gain increasing control over the souls you create and the powers of the vessels. Servitor souls at baseline without special domains, power, or other soul-based manipulation powers have intelligence that starts at the level of an animal and can eventually reach the level of a non-sapient AI.
The Souls you create start from a baseline ability, like a fireball, growing plants, or a function of one of your domains like the water cycle for a water or weather god that is built into the soul as its starting framework. This framework determines specific things about the Souls mentality and ability on the moment of it's creation. This allows the soul to grow and branch off of that initial framework and determines how it goes about developing power and intelligence, however, you can direct the changes manually if you desire as well as the speed of that growth.
These Servitors are completely loyal to you and worship your divinity, however, their more rigid mental structures and lower emotional states make them unable to produce the same kind of fervent growth that a pious mortal can give. If your Servitors developed or were granted true emotional sapience their zealotry could give you a similar boost to a pious mortal.