101Leafy researched the games.
Deep Darkhammer

Jet-black Hammer. A single hit feels like the weight of darkness descending.
| Class | Hammer |
|---|---|
| Rarity | 10 |
| Attack | 1248 |
| Affinity | 40% |
| Slots | 2 |
| Price | 120,000z |
Upgrades
| Upgraded from | Hidden Breaker |
|---|
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 728.
Materials
BlackNargaPelt+ ×10, HvyNargacugaFang ×4, HvyNargaTailSpik ×6, HvnlyNargaScale ×1