Disaster / Destruction
A magical calamity occurs in the citadel of Hennetoren, which results in the transformation of many of its occupants into troll-like creatures, and the death of almost all of those who are not transformed. The citadel - henceforth referred to as the Howling Tower - begins to emit a terrible keening wail which brings forth a great horde of trolls from the nearby lakes, which rampage across the surrounding lands.