101Leafy researched the games.
Iron Katana "Grace"

Made with technology from the Orient. A strong Sword, but requires maintenance.
| Class | Long Sword |
|---|---|
| Rarity | 2 |
| Attack | 528 |
| Slots | 0 |
| Table price | 1,750z |
Upgrades
| Upgraded from | Iron Katana |
|---|---|
| Upgrades into | Iron Katana "Gospel", Dark Scythe |
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 692.