101Leafy researched the games.
Frost Edge

Made from Ice Crystals that have stood the test of time over many millennia.
| Class | Sword |
|---|---|
| Rarity | 2 |
| Attack | 98 |
| Ice | 240 |
| Slots | 0 |
| Price | 840z |
Upgrades
| Upgraded from | Hunter's Dagger+ |
|---|---|
| Upgrades into | Frost Edge+ |
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 700.
Materials
Ice Crystal ×8, Iron Ore ×8, Giaprey Scale ×5, Knife Mackerel ×3