101Leafy researched the games.
Gravios Fire Lance

Forged in a heat equal to a Black Gravios's heat beam. Next step in destructivity.
| Class | Lance |
|---|---|
| Rarity | 10 |
| Attack | 598 |
| Fire | 400 |
| Defense | +14 |
| Slots | 2 |
| Price | 115,000z |
Upgrades
| Upgraded from | Gravios Lance |
|---|
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 748.