101Leafy researched the games.
Akantor Dark Melody

Hunting Horn with the power of a black deity. Its tone can shake the soul of all.
The center opens and closes with the wind, and the sound comes out from there. The mechanism is like the way monsters make their calls, so this horn, made with Akantor materials, truly becomes the voice of the "Black God." Some who hear it are said to be spurred on, while others lose heart.
Our translation of 復刻 ハンター大全 (KADOKAWA / Enterbrain, 2014), page 160.
| Class | Hunting Horn |
|---|---|
| Rarity | 10 |
| Attack | 1716 |
| Affinity | 40% |
| Slots | 0 |
| Notes | Purple, Green, Light blue |
| Table price | 145,000z |
Songs
| Notes | Song | Effect |
|---|---|---|
| Purple, Purple | Movement Speed Up | Faster movement with weapon drawn for 3 min *2 |
| Purple, Green | Health Rec [Lo] | Restores 20 health (33% chance) or 10 (67%) |
| Green, Green, Purple, Light blue | Health Rec [High] | Restores 40 health (33% chance) or 30 (67%) |
| Light blue, Green, Light blue | No Heat | "Heat Cancel [Hi]" effect for 4 min |
| Light blue, Light blue, Green, Purple | Hear Protect [Hi] | "High Grade Earplug" effect for 3 min |
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 166.
Upgrades
| Upgraded from | Akantor Horn |
|---|
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 742.