Law 17 of The 48 Laws of Power is "Cultivate an Air of Unpredictability: Keep Others in Suspended Terror". This law states that people are creatures of habit and like to see familiarity in others' actions. By being unpredictable, you can keep people off-balance and make them work harder to understand you. This can put them in a state of constant fear, making them more pliable. 

Here are some examples of how this law can be applied:Pablo PicassoAfter becoming a well-known artist, people assumed that everything he did was calculated. When he told his art dealer that they would no longer work together, the dealer was confused and offered him a better deal. 

Muhammad AliWhen Ali announced that he would fight George Foreman, Foreman expected Ali to dance around him. Instead, Ali went right up to Foreman and punched him out. 

https://www.amazon.com/48-Laws-Power-Robert-Greene/dp/0140280197