101Leafy researched the games.
Black Tempest

Evolution of the Diablo Horn. Made from a calamitous black wyvern.
| Class | Lance |
|---|---|
| Rarity | 7 |
| Attack | 552 |
| Affinity | -30% |
| Slots | 1 |
| Price | 75,000z |
Upgrades
| Upgraded from | Diablo Spear |
|---|---|
| Upgrades into | Rising Tempest |
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 750.