101Leafy researched the games.
Imperial Sword

Replica of a Sword made during the Guild's genesis. Given to those with dignity.
| Class | Long Sword |
|---|---|
| Rarity | 7 |
| Attack | 1008 |
| Affinity | 10% |
| Slots | 3 |
| Price | 60,000z |
Upgrades
| Upgraded from | Guardian Sword |
|---|---|
| Upgrades into | Aqua Guardian |
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 694.