That's where the best part comes in: Fear can infect them as long as they're in proximity to him and in his temple. Not only would they be trapped in a dimension that's only escapable by few people with correct knowledge but they would learn fear and it will spread to each and every one of them. [ She whispers to him, almost a little excitedly. Look, she's proud as fuck of her plan to... basically take a whole species of creature and trap them in a horror playground for all of their eternity. ]