101Leafy researched the games.
Exterminator Bow II

Black Bow with an evil dragon's power. One draw of the bow is cause for chaos.
| Class | Bow |
|---|---|
| Rarity | 10 |
| Attack | 384 |
| Affinity | 20% |
| Defense | +20 |
| Slots | 1 |
| Price | 150,000z |
Upgrades
| Upgraded from | Exterminator Bow I |
|---|
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 802.