101Leafy researched the games.
War Mace

Crafted from pure iron, this large Hammer boasts improved Attack power.
| Class | Hammer |
|---|---|
| Rarity | 1 |
| Attack | 468 |
| Slots | 0 |
| Price | 1,100z |
Upgrades
| Upgraded from | War Hammer+ |
|---|---|
| Upgrades into | Iron Striker, Anchor Hammer, Black Cauldron, Bone Axe, Metal Bagpipe |
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 718.