Impervium was a tremendously resilient alloy frequently used for the armor on capital ships. It was stronger than duranium, another type of protective metal.
During the Clone Wars, General Grievous of the Confederacy of Independent Systems flew a customized Belbullab-22 starfighter nicknamed the Soulless One, which had a hull made of impervium.
Behind the scenesEdit
Impervium was first mentioned in the Star Wars Legends article Soldiers of the Empire! in 1978. Its first known canonical appearance was in the mobile-game Star Wars: Galactic Defense after a 2015 update.
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