You live in the lone mountain with your family in a cave. The entrance is just beyond the rock formation that used to be your brother. Unfortunately, the sunlight did not agree with him. As a family of trolls, you actively avoid such a fate, but your brother was more dim-witted than most.
It is late one night when you and your mother hear the rumblings of a nearby camp. Some villagers have traveled up onto the mountainside. For what reason, you do not care to know. You simply imagine how delicious they will be to eat when you capture them for your supper.