101Leafy researched the games.
Black Lute

A darker than dark Hunting Horn. Anyone who hears this Horn feels faint.
| Class | Hunting Horn |
|---|---|
| Rarity | 5 |
| Attack | 780 |
| Dragon | 100 |
| Slots | 0 |
| Price | 15,000z |
Upgrades
| Upgrades into | Fatalis Menace, Ancient Fatalis Lied |
|---|
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
Dark Stone ×1, Dark Piece ×4, Pokke Ticket ×1