So, Hope is all about belief, right? And Princes are able to destroy through their aspect as well as just destroying their aspect. So, would a Prince of Hope have the power to make people hallucinate and cause destruction in that way?

Belief doesn’t equate thought, though. Hallucinations are more an Alteration of the Mind, which would tie it more to a Witch or Heir of Mind than a Prince of Hope. Also Hope is more nuanced than just all about belief, but it’s a good starting point.