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 Katana, and fits with the "Feudal Asia" theme of other cobalt weapons and armor.
 * A possible reason the cobalt sword is the fastest of all the ore swords is because it resembles a Katana which is known to be a very thin light blade, in real life and in-game therefore, it is fastest.

History
코발트 검 Кобальтовый меч 钴剑