Spirit energy cannon



Kuvira's superweapon was a large weapons used by the Earth Empire to conduct long-range artillery warfare. Firing spirit energy from harvested spirit wines, it is the most powerfull artillery piece of the Avatar universe to date, being capable of destroying a whole hill in one shot.

History
After the escape of Varrick, Kuvira ordered Bataar Jr. and Zhu Li to build her a new superweapon. After Kuvira's army destroyed the Swamp to get into possession the spirit wines, the construction of the superweapon escalated greatelly.

After a few weeks of construction, the weapon was almost complete, and was scheduled to be fired for the first time. The first shot was a failure, as the weapon almost critically overloaded and almost blew up. As the power core was overloading, Bataar Jr. managed to disable the wiring that connected the cannon just in time. After close examination, it was revealed that one of the gears had almost been broken in half. Bataar Jr. then ordered the weapon to be dismantled and for it to be checked. When Kuvira showed up unexpectedly she ordered the weapon to be ready the next day, so that a test shot would determine it's effitiency.

The next day, the weapon was fired again at the firing ceremony, but again almost critically overloaded, After Battar Jr. found out that the critically important firing pin had been removed, Kuvira found the missing piece of Zhu Li and sentenced her to be the first person killed by the weapon in an abandoned city. When the superweapon had been fixed and ready to fire, the camp came under attack by the Beifong's who had just escaped their prison. As the weapon was firing, a wave of earth struck it from the side, dislocating it's trajectory. The weapon fired at a hill above the abandoned city, completely annihilating it.

Trivia
Kuvira's superweapon resembles the Schwerer Gustav, a WWII era Nazi German railway guy used during the Siege of Sevastopol and the bombing of Warsaw during the Warsaw uprising.