101Leafy researched the games.
Ceanataur Piercer

Offensive Lance with great sharpness. Made from hard Shogun Ceanataur shell.
| Class | Lance |
|---|---|
| Rarity | 6 |
| Attack | 460 |
| Affinity | 5% |
| Slots | 1 |
| Price | 50,000z |
Upgrades
| Upgraded from | Ceanataur Stinger, Bone Claw Lance+ |
|---|
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 750.