Long ago in a distant land, a Japanese emperor who was also a mighty warrior saw his land overtaken by a shapeshifting demon known as Aku. To defeat Aku’s evil, the emperor turned to the ancient gods Vishnu, Odin, and Ra to forge him a magic sword. Wielding the weapon, the emperor defeated Aku and trapped him in the form of a black tree.

This is the origin story for the sword of Samurai Jack, who would later inherit the weapon from his emperor father. After Aku escaped the tree and flung Jack into the future, Aku took over the world. Centuries later, Jack reappears and battles Aku with the magic sword’s powers of purity and strength, the only possible defense against Aku’s evil.

Created by Genndy Tartakovsky, the original four seasons of Samurai Jack ran on Cartoon Network from 2001 until its cancellation in 2004. The series was later revived in 2017 to conclude the story in its fifth and final season. Throughout the series, Jack’s magic sword — or katana, more specifically — was an essential storytelling device as it was the only effective weapon against Aku. Plus, with the sword’s link to........

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