He's Unstoppable

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▶ Art description (from wookieepedia):

The Battle of Hypori of the Clone Wars took place on the planet Hypori four standard months after the First Battle of Geonosis. Notable as the first public appearance of General Grievous, Supreme Commander of the Separatist Droid Army, the battle was initially intended as a Republic raid on the Separatist foundries on Hypori, based on intelligence gathered by Jedi Master Daakman Barrek, who led the attack. However, the Separatist forces were waiting for the Republic assault, and it quickly turned into slaughter, with the Republic forces shot down.