The Onyx Greatsword is one of the many weapons that can be acquired in the Frontier. The Onyx Greatsword can be purchased from the Reus the Smith in Topple Town at a price of 380,000 gold. Other viable methods of acquiring the Onyx Greatsword include the following:
- A possible gift from the Otherworld Present.
- A possible 'uncommon' drop from the Ancient Onyx Knight.
- A possible reward from the Grand Treasure Chest.
In appearance, the Onyx Greatsword is a large blade forged out of pure onyx attached to a black 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 Onyx 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 Onyx Greatsword has no special abilities or perks whatsoever.
- Like most items from the Frontier's release to the Otherworld Update, it can be acquired from the Otherworld Tower dungeon.