So this idea just poped into my head..DARK TROOPS!!! they are called dark troops!!! so why not incorporate monsters and creatures associated with darkness, creatures that have hunted our dreams at the darkest hours of the night.
VAMPIRES
WERE-WOLVES
GHOULS
ZOMBIES!!!!!!!!!:p (WHO DOESNT LOVE A GOOD ANIMATED ZOMBIE)
while we'r at it why not ghosts just for the heck of it
