Cobalt Sword

The Cobalt Sword is a Hardmode sword crafted solely using Cobalt Bars, and lies at the lowest tier of Hardmode ore swords along with the Palladium Sword. Like other Hardmode ore swords, it is capable of autoswing. It can also swing faster than all of the other Hardmode ore swords.

Trivia

 * The Cobalt Sword bears a strong resemblance to the Muramasa and the Japanese, and fits with the "Feudal Asia" theme of other Cobalt weapons and armor.
 * The Cobalt Sword has the fastest speed of all Hardmode Ore swords. This may be because it resembles the real-world Katana, a very light, thin blade (which is also in Terraria).

History
Épée en cobalt 코발트 검 Кобальтовый меч 钴剑