101Leafy researched the games.
Raven Torrent

The sharpened beak of a Yian Garuga. This black Hammer's power is devastating.
| Class | Hammer |
|---|---|
| Rarity | 5 |
| Attack | 728 |
| Affinity | 20% |
| Slots | 1 |
| Price | 10,000z |
Upgrades
| Upgraded from | Kut-Ku Jaw |
|---|---|
| Upgrades into | Wolf Torrent |
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 724.
Materials
Sharpened Beak ×2, Garuga Mane ×4, Garuga Scale ×8, Lg Monster Bone ×3