101Leafy researched the games.
Blue Tail

Jeweled Lance with high Fire element and power. A technological masterpiece.
| Class | Lance |
|---|---|
| Rarity | 4 |
| Attack | 322 |
| Fire | 300 |
| Slots | 1 |
| Price | 4,900z |
Upgrades
| Upgraded from | Red Tail |
|---|---|
| Upgrades into | Blue Prominence |
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 750.