101Leafy researched the games.
Black Sword

A Sword with dark power within. The void it creates envelopes all in its path.
| Class | Sword |
|---|---|
| Rarity | 5 |
| Attack | 210 |
| Dragon | 200 |
| Slots | 0 |
| Price | 15,000z |
Upgrades
| Upgrades into | Black Dragon Sword, Black Ruiner Sword, Double Dragon |
|---|
Upgrade tree from モンスターハンターポータブル 2nd G 公式ガイドブック (Enterbrain, 2008), page 706.
Materials
Dark Stone ×1, Dark Piece ×4, Pokke Ticket ×1