101Leafy researched the games.
Fire and Ice

Star-crossed warriors destined to kill each other. Their swords became one set.
| Class | Dual Blades |
|---|---|
| Rarity | 10 |
| Attack | 350 |
| Slots | 0 |
| Price | 130,000z |
Upgrades
| Upgraded from | Twin Nails+ |
|---|
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 716.