Heres a costume idea, a Vampaneze from the Darren Shan books. It's easy and fun.
Here's what you'll need:
1.A red or gray pen
Simply paint your face purple, put in the contacts if you have them, and draw a little "scar" on each finger in a straight line, and put on the fake nails.
3.Red contacts (optional)
4.Long fake fingernails (clear) (optional)
If you want to you can put on a cloak or robe for an extra touch!
Thanks to ysri for this great idea!!