I'm a nightmare!

I had being charged for murder of lone traveller and for assassination of the president of united states and I was being sentenced to life in prison but when I get to the prison I pull out a smoke with stars and blow it at inmates causing them to be under my control and now I had taken over the prison and claim it as my own and I control the inmates so I can build my army... because I'm a nightmare! (be anyone including me and just don't bother about the voice)