101Leafy researched the games.
Devil Slicer

A beautiful blade forged by an aimless wanderer from the Orient who soon disappeared.
| Class | Long Sword |
|---|---|
| Rarity | 4 |
| Attack | 720 |
| Thunder | 450 |
| Slots | 1 |
| Price | 6,350z |
Upgrades
| Upgraded from | Eager Cleaver |
|---|---|
| Upgrades into | True Devil Slicer |
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 692.