Is it Halloween? Or do you just need to scare someone? If you follow this article it should go down a treat at Halloween and it is scary at any time of the year!
Steps
Wear dark clothes and a dark cloak.
Make a staff out of wood or out of metal if you can. Be careful with these, don't whack a person's head off!
Walk up to people and look them straight in the eye.
Talk slowly and say stuff like "Oh really? Have you ever died? I have," or something like that.
Read books or stories about necromancers and pretend that you are one.
Get red or black eyes contact lenses for your eyes - they're scary and cool.
Learn a simple mind trick to scare them more.
Tips
If you can't get a Staff, then forget it, Necromancers don't have to have a Staff.
Paint the staff black and put a plastic skull on it if you want it to look scarier.
Be creative.
Warnings
You might also get arrested.
You might get hurt if someone is really scared of you. Don't be too scary, and drop the act if someone is really freaked out.