Necromantic / Dark Magical Symbols

Hi all. I'm going to a Halloween party and want to go as a necromancer I'm wondering if any of you can help me find some Necromantic or Dark Magical symbols from Warhammer so I can look more like a necromancer, rather than a generic wizardy monk dude. I have the old Warhammer Armies: Undead book, which will be useful, but that's it.

Any help would be appreciated :)

Well, the new dark elf stuff is crammed with it, from the book to models. Probably some pics of that online and the current WD has some discussion and examples of them at the back.