Cobalt Sword

The Cobalt Sword is a sword crafted using Cobalt Bars and is one of the materials to craft Excalibur. It bears a strong resemblance to the Muramasa and can be swung continuously, also much like Muramasa and Phasesaber. 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.