101Leafy researched the games.
Corpse Blades

The fearsome blades of the gold and silver dragons. Powerful fire attribute.
| Class | Dual Blades |
|---|---|
| Rarity | 8 |
| Attack | 266 |
| Fire | 390 |
| Slots | 1 |
| Price | 85,000z |
Upgrades
| Upgraded from | Gradios Ultimus |
|---|---|
| Upgrades into | Punishment Blades |
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 714.