Samurai Jack's katana, originally The Emperor's katana, is a holy katana that was forged by the three gods Odin, Ra and Rama for the sole purpose of destroying Aku and was the only weapon that was capable of doing so in the world.
Powers and Stats
Tier: 7-C, Can ignore durability against evil beings
Name: No canon name, usually called Jack's Katana, Jack's Sword, Magic Sword, etc.
Origin: Samurai Jack
Age: Over 50 years
Classification: Magic sword
Wielders: Samurai Jack
Powers and Abilities: Durability Negation (against evil beings), On the hands of evil, it will never hurt an innocent, Can "leave" it's wilder
Range: Extended Melee
Weaknesses: If an evil being is wielding it, it will not work against an innocent. The sword can leave it's wielder if it believes he is not worthy.