C-B3 cortosis battle droid

The C-B3 cortosis battle droid, or C-B3 for short, was a cortosis-armored model variation of the B2-series super battle droids which were produced in secret by the Confederacy of Independent Systems on the planet Mokivj near the end of the Clone Wars, in 19 BBY. They were manufactured in the Mokivj droid factory by Duke Solha, his brother and his sister.

When Jedi Knight Anakin Skywalker discovered the cortosis super battle droids and the factory that produced them, he considered them "unstoppable" and a big threat to the Jedi Order and the Galactic Republic. He therefore decided that he should destroy the factory that produced them along with all the already manufactured ones and the mine where the cortosis was being extracted. So that the Separatists couldn't manufacture any more droids on Mokivj. Skywalker set the mine to explode, despite the objections of Senator Padmé Amidala, Thrawn, and LebJau. The explosion was expanded by the cortosis which activated volcanic activity on the planet and caused a catastrophe. The schematics were also reprogrammed so that any future cortosis battle droids would end up destroying themselves. While some C-B3s were later produced elsewhere, such as ones deployed to the planet Wrea, they used the sabotaged designs making them ineffective.

The cortosis B2 super battle droid had the exact same weaponry as the standard model and the same height. However, the cortosis in their armor made them much heavier and also made them invulnerable to lightsabers and blaster bolts in their whole body but their optical sensors; as they weren't covered by cortosis. They were equipped with a dual wrist blaster, like the B2-series battle droid did.

Text and facts from the “C-B3 cortosis battle droid” article on Wookieepedia, licensed under CC BY-SA 3.0. Modified for this site.