101Leafy researched the games.
Black Ruiner Sword

With a reputation for ending darkness, its power gathers at the sound of a roar.
| Class | Sword |
|---|---|
| Rarity | 8 |
| Attack | 280 |
| Dragon | 300 |
| Affinity | -20% |
| Slots | 0 |
| Table price | 100,000z |
Upgrades
| Upgraded from | Black Sword |
|---|---|
| Upgrades into | True Blk Ruiner Swd |
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 706.