101Leafy researched the games.
Ancient Blow

Sticks and stones may break bones, but a giant bone fist break bodies... Painfully.
| Class | Hammer |
|---|---|
| Rarity | 8 |
| Attack | 1248 |
| Affinity | -20% |
| Slots | 2 |
| Price | 70,000z |
Upgrades
| Upgraded from | Fist of Fury |
|---|---|
| Upgrades into | Foolhardy Stone Fist |
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 720.