101Leafy researched the games.
Susano Blade

Ancient blade only given out by Guild elders. Holds the soul of a dragon killer.
| Class | Long Sword |
|---|---|
| Rarity | 8 |
| Attack | 1008 |
| Fire | 170 |
| Affinity | 10% |
| Slots | 1 |
| Price | 50,000z |
Upgrades
| Upgraded from | Centenarian Dagger |
|---|
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 696.