Spell Cannon

A spell cannon is a clockwork, steam powered, blunderbuss-like device that uses ammunition known as spell crystals to shoot spells. Cannons come in several sizes ranging from as small as a handgun to as big as an artillery piece. While the giant spell cannons are the most impressive with their astounding range and firepower, it is the smaller, handheld weapons that see the most use.
  No longer are lightning bolts, fireballs, rays, gasses, clouds, and webs the exclusive arsenal of wizards and sorcerers. With modern advances in technology, anyone can buy an equalizer and shoot these powerful spells like a master wizard. Of course, truly powerful cannons are going to be expensive. But even a small, cheap spell cannon is better than not having one at all.