Rengoku sword in Blox Fruits: how to get it, price and moves
Rengoku is a Legendary sword in the Second Sea. The wiki says: "Use Hidden Key".
Data checked: Oct 10, 2026
Facts
| Rarity | Legendary |
|---|---|
| Sea | Second Sea |
| Location | Ice Castle |
| How to get | Other |
| Wiki wording | Use Hidden Key |
| Release update | Update 13 |
Rengoku moves and mastery levels
| Key | Move | Mastery needed | Cooldown (s) | Energy |
|---|---|---|---|---|
| M1 | Normal Attack | – | – | – |
| Z | Demon Slayer | 150 | 9 | 20 |
| X | Burning Slash | 350 | 13.5 | 30 |
Move names, mastery levels, cooldowns and energy costs come from the wiki. A dash means the wiki states no figure.
Other Legendary swords
- Saishi (2,000,000 Beli)
- Shark Anchor
- Pole (2nd Form)
All swords by rarity · Fighting styles · Blox Fruits
Questions
How do you get Rengoku in Blox Fruits?
The wiki says: "Use Hidden Key".
Where is Rengoku in Blox Fruits?
Location: Ice Castle (Second Sea).
What mastery do the Rengoku moves need?
Z Demon Slayer: mastery 150; X Burning Slash: mastery 350.
Source: Blox Fruits community wiki page Rengoku (rev 446991, Oct 3, 2026), with the rarity totals from Swords (rev 441030). CC BY-SA 3.0. Checked Oct 10, 2026. Numbers were restructured here; no wiki images are used.