I have a main villain in my story (ends up giving up his soul to a Dark Spirit and becoming possessed, and then later on possesses one of his two sons by recruiting other Dark Spirits. His main goal is to sacrifice the main protagonist so that the world is forever locked in winter and that he will become immortal) Only problem is... I'm worried that he doesn't seem important enough when it comes to the other more secretive villains lying in wait for my characters. He does get involved at times but otherwise he doesn't seem all that "bad". Any tips on how to make a villain stick in your mind without going into their own POV?