A YJA Moment - Warworlds

The original Warworld was a giant planetoid, just slightly smaller than the Earth's Moon.  Armed with an array of devastation weapons, it was capable of laying waste to whole solar systems.  Though its creators were unknown, the powers of the Universe would wage endless war in order to possess it for themselves.  The last owner, a Rakatan warlord, took the Warworld beyond the boundaries of Known Space millennia ago, relegating it to the stuff of legends

In the years following Warworlds disappearance, many empires desired the fear and power the weapon represented and would attempt to attempt to construct a successor sphere.  The AI that controlled the artificial planetoid Ranx, turned its peaceful trading hubs into a battle-station.  The mysterious creators of the Cybertronians created the enormous Transformer known as Unicron.  The Manhunters would make a great construction and control center they called Biot. Even the great Devourer of Worlds, Galactus travels in the great Worldship that he has named Taa. 

However, the most famous heir to the Warworld title was the fabled Death Star series of battle-stations.  The Sith Lord Sheev Palpatine learned about the legends and sought to recreate it using is newly-founded Galactic Empire.  Taking decades, he constructed a number of prototypes of the Death Star, each one more elaborate than the next.  

The main weapon of the Death Star was a planet-destroying super-laser, which used the power-amplifying power of Kyber Crystals to make the weapon allegiantly more powerful than the laser possessed by the Warworld itself.  Sadly, no examples of the DS-series Battlestations remain.  The first two were destroyed by the Rebellion against the Empire, and a third version was destroyed by the Mythic Avengers before the Sinestro Corp could use it as the new home for its Central Power Battery.

Recently the original Warworld returned, helmed by the intergalactic villain known as Mongul.  When he found that the Reach sough the metahumans of Earth, he brought Warworld to the Sol System in order to destroy it.  He was defeated by Young Justice, but the Crystal Key that controlled the station was recovered by Vandal Savage, who took the weapon to Uncharted Space.  Its current whereabouts are unknown.