101Leafy researched the games.
Thunderbane

Uses the Electro Sac of a Khezu to electrically charge the blade.
| Class | Sword |
|---|---|
| Rarity | 3 |
| Attack | 168 |
| Thunder | 170 |
| Slots | 1 |
| Price | 1,860z |
Upgrades
| Upgraded from | Assassin's Dagger |
|---|---|
| Upgrades into | Frightbane |
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 700.