101Leafy researched the games.
Demon Rod

Wrapped in thunderous Rajang fur, it splits those foolish enough to touch it.
| Class | Great Sword |
|---|---|
| Rarity | 7 |
| Attack | 768 |
| Thunder | 300 |
| Affinity | 15% |
| Slots | 0 |
| Price | 80,000z |
Upgrades
| Upgraded from | Wyvern Agito |
|---|---|
| Upgrades into | Great Demon Rod |
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 680.
Materials
Rajang Horn ×1, Rajang Fang ×4, Rajang Tail ×2, Commendation ×4