101Leafy researched the games.
Dragonbreaker

The claw of Lao-Shan, legend says this ancient weapon has the power to slay dragons.
| Class | Hammer |
|---|---|
| Rarity | 5 |
| Attack | 884 |
| Dragon | 330 |
| Slots | 0 |
| Price | 40,000z |
Upgrades
| Upgraded from | Dragon Destroyer |
|---|---|
| Upgrades into | Dragon Demolisher |
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 724.