101Leafy researched the games.
AncientFatalisRuiner

Giant white Hammer embodying the tremendous power of a Fatalis' ancestor.
| Class | Hammer |
|---|---|
| Rarity | 10 |
| Attack | 1300 |
| Dragon | 380 |
| Defense | +8 |
| Slots | 0 |
| Price | 150,000z |
Upgrades
| Upgraded from | AncientFatalisBuster |
|---|
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 726.