Swordball

A "swordball" was an arcane spell that caused rusty fragments of old weapons to explode outwards in all directions. It worked exactly the same way as a fireball exploded with flames.

History
When the city of Procampur in the Vast was assaulted by Maldrithor, the "Sarbreenar Wyrm", the people of the city hired a wizard to slay the dragon. The wizard used swordballs to bloodily tear Maldrithor apart, and sent the dragon crashing down dead into the harbor amid a rain of blood and bone.