Planet Prison was a Superweapon built by the Galactic Republic during the Cold War. When deployed it supercharged the upper atmosphere of a planet turning its atmosphere into one giant ion cannon preventing any ships from taking off or landing. Any ship attempting to do so would be disabled by the ion field and crash. It was designed by Sith Lord Tarnis who was masquerading as a Republic scientist, Doctor Eli Tarnis.

With help from the criminal gangs, the Migrant Merchants' Guild and Black Sun he stole the weapon and its plans and attempted to deploy it on Coruscant so as to secure the surrender of the Republic to the Sith Empire.

His plans were thwarted by the intervention of a Jedi Knight. The knight in question unfortunately earned the wrath of Darth Angral, who had masterminded the scheme, by killing Lord Tarnis, who was Angral's son.

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AppearancesEdit

• Star Wars: The Old Republic (First appearance)