101Leafy researched the games.
Wyvern Blade "Maple"

Wyvern Blade draped in the colors of Autumn. One stroke causes an explosion of fire.
| Class | Long Sword |
|---|---|
| Rarity | 7 |
| Attack | 960 |
| Fire | 340 |
| Slots | 0 |
| Price | 75,000z |
Upgrades
| Upgraded from | Wyvern Blade "Blood" |
|---|---|
| Upgrades into | WyvernBlade"Silver" |
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 690.