101Leafy researched the games.
Teostra Blade

Crimson blade that holds the power of Teostra. An elegant way to scorch the earth.
| Class | Great Sword |
|---|---|
| Rarity | 7 |
| Attack | 768 |
| Fire | 480 |
| Slots | 0 |
| Price | 80,000z |
Upgrades
| Upgraded from | Weathered Grt Sword |
|---|---|
| Upgrades into | King Teostra 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.