Here’s his sigil!
LOL! YES, I did draw that just for this reply! But in all seriousness if you’re talking about Vlad the Impaler then you’re getting into necromancy. I don’t think it’s necessary to have a sigil for a ghost. Just learn how to contact the dead. Although I would not approach this in a haphazard way.
If you’re talking about Dracula from the Bram Stokers novel then you’re talking about an egregore. I’d say study the novel, write down his characteristics and basic info from the book itself, and create your own ritual. Incantations, offerings (blood might be an option to consider), and other items can all be included if it helps. Be creative, let the author’s imagination become one with yours. The sky is the limit (or not) when dealing with thought-forms. Of course, getting into state (gamma-theta sync) and calling forth might be all you need. Just be careful you have the egregore you want or you might be bringing an entity that may be particularly nasty.
On a side note, if any experienced magician wants to see if the sigil works and successfully manifests Count Chocula let me know! I did draw it with intent and I promise no vampirism stuff attached to it (the irony of that!). Actually, I might do I new topic on that.