A wretched entity of the frozen lands, the WinterKill is the remnant of a mortal left to die in despair and endless cold.
There are many dangers at the poles and in the icy mountians of the world, but few dangers are harder to survive then an attack from an Ice Ghoul, a shadow-spirit whose very touch can be deadly.
The secret for immortality has been discovered by an eccentric wizard/mad scientist. Its found you need to reapply once a month. As people stop dying, and the birth rate increases exponentially, people are forced into homelessness, because of the need for food reamins the same, and food is not being produced fast enough to feed the undying population. The PCs have to find the creator and kill him, and destroy production, to save the world from undying, unending torture from hungryness.