I know this is off topic and I apologize if it offends, but I trust this community to give me thoughtful answers. I'm writing a fan fic and I need the villain to be able to hide his actions from clairvoyants. He only has a trace of innate talent, but great deal of will and patience to learn thaumaturgy. I never really worry about hiding what I'm doing that beyond basic wards I don't know what he would do. What gods to invoke or herbs, minerals or materials to use.
What would you do if you were trying to sneak up on a clairvoyant?