101Leafy researched the games.
LgndaryFatalisSickle

A most fatal giant scythe. Unhealable wounds torture the unlucky for centuries.
| Class | Long Sword |
|---|---|
| Rarity | 10 |
| Attack | 1248 |
| Dragon | 300 |
| Slots | 0 |
| Price | 150,000z |
Upgrades
| Upgraded from | Fatalis Sickle |
|---|
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 696.