101Leafy researched the games.
Barbaroi Blade

A great blade housing a raging inferno. The lightest swing ignites an epic blaze.
| Class | Great Sword |
|---|---|
| Rarity | 3 |
| Attack | 480 |
| Fire | 250 |
| Defense | +12 |
| Slots | 1 |
| Price | 2,150z |
Upgrades
| Upgraded from | Sentinel |
|---|---|
| Upgrades into | Crimson Goat |
Can also be made new at the smithy.
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.
Materials
Flame Sac ×4, Iron Ore ×30, Carpenterbug ×8, Unknown Skull ×1