101Leafy researched the games.
White Serpentblade

Beautiful Great Sword made from white Giaprey scales. Lined with gold fangs.
| Class | Great Sword |
|---|---|
| Rarity | 2 |
| Attack | 384 |
| Ice | 120 |
| Slots | 0 |
| Price | 1,100z |
Upgrades
| Upgraded from | Buster Sword |
|---|---|
| Upgrades into | Silver Serpentblade |
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 686.
Materials
Giaprey Hide ×6, Sharp Claw ×4, Iron Ore ×5, Brute Bone ×3
Plus Class Tcket ×1, Giaprey Scale ×1