Destroyer

In Ravelia, long ago, a giant metal worms, constructed by the gnomes and dwarves in a joint venture to protect them from the encroaching drow. However, an error in the construction resulted in the creature going mad, destroying the workshops and ravaging the city. The worm left, and although the gnomes and dwarves rebuilt, their friendship was forever tainted as the two sides blamed each other for the destruction of the great city.