You are awesome! I am not sure if your offer stands but I'd sure love to see what you could create for my series, Heart of Vampire: https://tapas.io/series/Heart-of-Vampire
I am inclined to just let you do your thing and create, since you nailed the other covers you have made (sorry). Buuuut if you don't want to start with a blank slate, here are some ideas: a vampire on an operating table with his heart exposed (the opening scene of the novel), a derelict church on top of a hill, a swastika, eagle or some Nazi symbol being chewed on by vampire fangs.