Trolls are aggressive mythological creatures in the “Beowulf” series.
An adult is about 3 meters tall, a male differs from a female in having a thicker skin. Usually the monsters avoid people, but they were forced to change their habitat: they came down from the mountains to the plain closer to people because the creatures really need salt. Eating it, trolls become more peaceful and stop attacking people. Therefore, people, being afraid for their lives, had to start feeding them.