101Leafy researched the games.
Steel Ice Blade+

Steel Great Sword made from ancient Kushala Daora materials. Sharp and frozen.
| Class | Great Sword |
|---|---|
| Rarity | 5 |
| Attack | 720 |
| Ice | 240 |
| Slots | 0 |
| Table price | 50,000z |
Upgrades
| Upgraded from | Steel Ice Blade |
|---|---|
| Upgrades into | Daora's Decimator, Icesteel Blade |
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 686.