101Leafy researched the games.
Deadly Serpentblade

Made according to tradition from Remobra material. Poison seeps from red fangs.
| Class | Great Sword |
|---|---|
| Rarity | 4 |
| Attack | 720 |
| Poison | 270 |
| Slots | 2 |
| Price | 4,900z |
Upgrades
| Upgraded from | Vile Serpentblade |
|---|---|
| Upgrades into | Poison Serpentblade |
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.