The Gun

The Type-128 Planetary Defense Weapon, also known as "The Gun", "Planet Killer", and "D35TR0Y3R", is a large energy-cannon like weapon that ran off of a large, Eternal Core like reactor. There were several built on planets that the Eternals considered "vital", such as Earth. Amaaer, the Eternal "homeworld" was destroyed because their energy cannon was not fully built and/or functional at the time, with many stating that, if it had been complete, the Eternals would've won the Queiran Wars. In an emergency, if the reactor fails and the weapon MUST fire or else, the gun will run off of the operating Eternal's core energy, however this does tend to harm the Eternal in question. If the operator is Human, the gun will instead run off of their life energy, killing them but firing a projectile that resembles them. These projectiles are massively powerful compared to standard and Eternal-energy based projectiles, for reasons not yet known.

Although this weapon was fairly common, it has become increasingly rarer due to the majority of Eternal controlled planets mysteriously disappearing from existence. There is only one known on earth.