101Leafy researched the games.
Dragonslayer

Legendary dragon-killer. "Wield me true, and you will cut dragon scale like silk."
| Class | Great Sword |
|---|---|
| Rarity | 5 |
| Attack | 624 |
| Dragon | 460 |
| Slots | 0 |
| Price | 5,600z |
Upgrades
| Upgrades into | Eternal Annihilator |
|---|
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 688.
Materials
Lao-Shan's Scale ×8, DaoraDragonScale ×8, Fire Dragon Scl ×8, Tigrex Scale ×8