The Cobalt Greatsword is one of the many weapons that can be acquired in the Frontier. The Cobalt Greatsword can be purchased from the Reus the Smith in Topple Town at a price of 20,000 gold. It can also be acquired as a possible 'uncommon' drop from the Ancient Cobalt Knight.
In appearance, the Cobalt Greatsword is a large blade forged out of pure cobalt attached to an iron handle. As its description implies, it is designed to cut through foes with great might. Besides that, not much can be said about its simple appearance.
The Cobalt Greatsword's normal swing attack consumes around 2-3 stamina points for each hit. Each hit lasts about 1-3 seconds, making it rather sluggish than its other counterparts, the scimitars, and the rapiers. Unlike other unique weapons, the Cobalt Greatsword has no special abilities or perks whatsoever.
- It is the 2nd worst ore-based greatsword in the game.