101Leafy researched the games.
Void Gravios Spear

Made after the Gravios' fire proofing came under study and was reborn as a weapon.
| Class | Lance |
|---|---|
| Rarity | 7 |
| Attack | 414 |
| Fire | 360 |
| Defense | +12 |
| Slots | 1 |
| Price | 70,000z |
Upgrades
| Upgraded from | Black Gravios Spear |
|---|---|
| Upgrades into | 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.