Vorlon Planet Killer
The Vorlon Planet Killer is a spacecraft and superweapon that features in Babylon 5.
The Planet Killer was a large starship that was produced by the Vorlons in secret and unleashed during the last Shadow War. This was after the rules of engagement between the Vorlons and the Shadows was broken when John Sheridan came into contact with Lorien. This gave the Vorlons the opportunity to unleash their planet destroying weaponry against their ancient enemies and began a systematic purge of those planets that had allied with their old foes in an effort to destroy their influence among the younger races.
The Vorlon Planet Killer was a large vessel which was capable of opening up and firing a powerful energy cannon that was capable of destroying an entire planet.