At Halloween time, a series of spooky skeletons come to life and go out of their graves to walk the streets and fields. With anger in their hearts, they are ready to give free rein to the fury accumulated while suffering and being subjugated in the hereafter. These cadaveric beings, made exclusively of bones, has no need to exert direct violence, resorting to physical contact or get their hands dirty to attack. They are actually so chilling that can literally scare to death anyone who is in their way, and by the way in a few months, be able to add new soldiers for their army of spooky skeletons.
(Or a similar design)