101Leafy researched the games.
Blood Horn

Red Hunting Horn made from wrapped Red Khezu hide. Its color is very unsettling.
| Class | Hunting Horn |
|---|---|
| Rarity | 6 |
| Attack | 936 |
| Thunder | 320 |
| Slots | 1 |
| Notes | Purple, Green, Red |
| Table price | 40,000z |
Songs
| Notes | Song | Effect |
|---|---|---|
| Purple, Purple | Movement Speed Up | Faster movement with weapon drawn for 3 min *2 |
| Purple, Red, Red | Attack Up [Hi] | Attack +15% for 1 min 30 s |
| Red, Green, Red | Defense Up [Hi] | Defense +20% for 1 min 30 s |
| Purple, Green | Health Rec [Lo] | Restores 20 health (33% chance) or 10 (67%) |
| Green, Red, Green, Purple | Recover Spd Up [Hi] | Red health recovers 3× as fast for 2 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 | Khezu Horn+ |
|---|---|
| Upgrades into | Blood Flute |
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 738.