101Leafy researched the games.
Black Rain Darklance

Lance of the blackest night. Wielder's murderous intent soon finds release in prey.
| Class | Lance |
|---|---|
| Rarity | 10 |
| Attack | 552 |
| Affinity | 40% |
| Slots | 2 |
| Price | 120,000z |
Upgrades
| Upgraded from | Hidden Stinger |
|---|
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 752.
Materials
LeatherNargaTail ×3, StrNargaCttngWng ×7, ThickNargaScale ×10, HvnlyNargaScale ×1