101Leafy researched the games.
Golem Blade+

A Great Sword made from a large bone. Made for the highly experienced.
| Class | Great Sword |
|---|---|
| Rarity | 3 |
| Attack | 576 |
| Defense | +4 |
| Slots | 2 |
| Price | 2,600z |
Upgrades
| Upgraded from | Golem Blade |
|---|---|
| Upgrades into | Valkyrie Blade, Executioner |
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 680.