101Leafy researched the games.
Crystal Hammer

Improved Spiked Hammer. Made via the generous use of expensive crystals.
| Class | Hammer |
|---|---|
| Rarity | 3 |
| Attack | 676 |
| Slots | 1 |
| Price | 2,600z |
Upgrades
| Upgraded from | Spiked Hammer+ |
|---|---|
| Upgrades into | Crystal Nova |
Can also be made new at the smithy.
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 722.
Materials
Lightcrystal ×2, Iron Ore ×25, Ice Crystal ×7, Carpenterbug ×10