Well, it's obviously based on a Star of David (or sexagram), but it's been put in a circle, which I guess makes it a sexacle (in the same way that a pentagram inside a circle is called a pentacle). Of course, there's a lot of details covered by the blood bat, including what looks like the top of a heart. So I suppose we'll never know.
But I'm calling it a sexacle, just cause it's funny.