101Leafy researched the games.
Cursed Spirit

A Sword filed with the malice of Diablos, it projects an aura of unease.
| Class | Sword |
|---|---|
| Rarity | 7 |
| Attack | 322 |
| Affinity | 15% |
| Slots | 2 |
| Price | 70,000z |
Upgrades
| Upgraded from | Spiked Bat |
|---|---|
| Upgrades into | Black Curse |
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 702.