You point the cannon in a direction away from you, and it spins up, forming a large beam of tesla energy in its barrel before firing out instantaneously in a 100-foot line in the direction of your choosing. Each creature in the line of fire must make a DEX saving throw. Upon a failed saving throw, the creature takes 8d6 lightning damage. A successful saving throw deals half as much.   The tesla energy ignites flammable objects in the line of fire which are not being worn or carried.