The Age of Worms
Black forest on the Island of Last Resort, home of a terrible, long forgotten black tree called a Night Twist. Hundreds of feet tall, twisted by dark magic, it emits a mournful song of despair for outrageous distances to draw its victims closer. It is vulnerable to fire and resistant to edged weapons, and it can create gale force winds. The only means of overcoming the song of the Night Twist is to kill, but killing it evokes a terrible curse to the one who does the deed.