Minions are the best companion of your Dynasty. They continuously produce blood for you. They help you to keep a positive blood flow in the game.

So far 13 minions are available in the game.

You have to purchase minions by blood. Each time a player buys a minion, its cost increases. 

Here's an example of how it works.

Yoga master is the first minion in the game. He produces 100 blood per hour. A player has to buy them with 5000 blood.
Each time you buy a yoga master his cost increases to 500 blood. That means 2nd yoga master will cost 5500 blood,3rd one will cost 6000 blood. 
Though the cost of the minions increases but they will provide the same amount of blood they provided you before. When its cost increases than the next minion it's better to buy the following minions.

When a player gets enough blood to purchase a minion, he/she should purchase it immediately to survive in a better way in the long run.