101Leafy researched the games.
Glass Royale

Horn used by a queen to steal and seal a holy song. She was turned into a bug.
| Class | Hunting Horn |
|---|---|
| Rarity | 9 |
| Attack | 1092 |
| Ice | 250 |
| Slots | 1 |
| Price | 80,000z |
Upgrades
| Upgraded from | Glass Queen |
|---|---|
| Upgrades into | Queen's Flute |
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 740.
Materials
Purecrystal ×2, Vspoid Razorwing ×15, Hornet Razorwing ×15, VespoidQn'sCrown ×3