Zombification is a disease, passed through saliva like rabies. Trolls are large humanoid monsters known for their ability to rapidly heal. When a troll contracts the zombie disease, a fierce stalemate results, the disease continually spreading and the troll continually recovering.
Where it comes from: It is not easy for a troll to catch the zombie
virus, as they are both strong and fast. Usually it happens when a zombie
stumbles upon a sleeping troll.
What it wants and needs: To eat. Half the monster is a zombie, and
half is a troll, and both are hungry. The troll pursues prey, the zombie bites,
and so both creatures are fed. The hunger never leaves, however, and it will
eat soil if nothing else is available.
What it will fight for: Food. A zombie troll will not stop trying to
eat, no matter what. It does not feel pain or fear. It can be distracted,
however, by a more convenient meal.
What happens if you eat it: Your death will be complicated and
agonizing. The zombie tissue will cause food poisoning, abdominal necrosis, and
possibly zombification. The troll tissue will attempt to reform itself inside
you, absorbing your flesh to create more of its own. You may be turned into a
new zombie troll, as the zombification of your flesh is matched by the growth
of the troll, or you may be slowly torn apart, as your flesh is killed by
zombie toxins and your body burst open by a troll teratoma. Or both.
What can be crafted out it: If sterilized, dried, and powdered,
zombiefied troll flesh is a powerful addition to healing potions. The hide of a
zombie troll is very tough, albeit uneven, and requires a great deal of work to
be turned into leather.