101Leafy researched the games.
Grayburg Javelin

Lance of the Iron Knights, mercenaries said to seek the secrets of Dragonriding.
| Class | Lance |
|---|---|
| Rarity | 7 |
| Attack | 437 |
| Defense | +8 |
| Slots | 0 |
| Price | 60,000z |
Upgrades
| Upgraded from | Knight Lance |
|---|---|
| Upgrades into | Dragon Rider Spear |
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 746.