101Leafy researched the games.
Fire Dragonsword

Made from Lao-Shan's Horn and Firestone. A treasure. One of the dragon-killers.
| Class | Long Sword |
|---|---|
| Rarity | 5 |
| Attack | 720 |
| Dragon | 350 |
| Slots | 1 |
| Price | 6,350z |
Upgrades
| Upgraded from | Bone Katana "Dragon" |
|---|---|
| Upgrades into | Red Dragonsword |
Can also be made new at the smithy.
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 690.
Materials
Lao-Shan's Horn ×1, Lao-Shan's Claw ×2, Firestone ×10, Commendation ×5