Regarding the vampire related theme, this is a pretty good idea.
With a bit of imagination and effort, some good icons touching the vampiric realm could come out.
Actually, this icon is too dark and too simple.
If u use a dark silhouette, u could help it to stand out with an interesting effect/bg, not only with a simple glow on a black bg.
Be more creative!
Also, this dark silhouette could have some reflections on it, reducing a bit of its flatness in this way.
Almost anyone could trace a contour(over a reference pic) to create a silhouette, adding a glow around it.
We can make hundred icons in this way, but i don't recommend it at all. We have some rules to follow.
Why don't u try to draw something using ur skills?
Read some of these tutorials that we have here(
2D Art Tutorials):
How to Make an Icon
General Icon Process Tutorial
Basic Icons Tutorial
ICONS by Crazyrussian
Basic Icon Guide
, and try to make something on ur own, avoid tracing and CnP.
I'm sure u will succeed if u insist on it.