Cobalt Sword

The Cobalt Sword is a sword crafted using Cobalt Bars and is a crafting material for the Excalibur in the older versions of the game. It bears a strong resemblance to the Muramasa and can be swung continuously. It can also swing faster than the Mythril Sword and the Adamantite Sword.

Trivia

 * The Cobalt Sword bears a resemblance to a Japanese Katana, and fits with the "Feudal Asia" theme that the other cobalt weapons/armor seem to have.