TL;DR
- Rengoku requires level 700+ and Second Sea access via Ice Castle hidden chest
- Farm Hidden Key from Awakened Ice Admiral (5% drop) or Arctic Warrior/Snow Lurker (1% drop)
- Features two powerful moves: multi-hit combos and instinct-breaking stuns
- Exceptionally effective against Shark and Cyborg races in PvP combat
- Upgrade through mastery to unlock maximum damage potential
The Rengoku represents a Legendary-tier weapon that stands among the most formidable armaments available within Blox Fruits’ Second Sea region. This blade offers remarkable accessibility compared to other end-game weapons, requiring minimal grinding while delivering exceptional combat performance. The sword excels at maintaining extended combos, disrupting enemy instinct mechanics, and proves particularly devastating when employed against Shark and Cyborg racial types. Ready to claim this powerful weapon? Continue reading for comprehensive acquisition strategies.

To acquire the Rengoku Sword, players must locate and unlock a concealed chest situated within the Ice Castle island located in Blox Fruits’ second sea. Additionally, accessing this territory demands reaching minimum level 700 or higher. Once these prerequisites are satisfied, execute the following procedures to obtain this exceptional weapon:
Upon arriving at Ice Castle island, you have two primary approaches for obtaining the essential Hidden Key: engaging standard NPCs or confronting the area boss. Strategic selection between these options depends on your current combat capabilities and available time investment.

Pro Tip: For efficient farming, focus on the Awakened Ice Admiral despite the higher difficulty. The significantly improved drop rate (5% vs 1%) makes this the most time-effective approach, especially when combined with the 2x Boss Drop Game Pass. Bring a friend or join a server with multiple players targeting the same boss to speed up respawn cycles.
Common Mistake: Many players overlook the precise hidden room location. The entrance isn’t visibly marked, so carefully scan the left wall section adjacent to the red carpet near the staircase base. The chamber becomes accessible only when approaching with the Hidden Key in your inventory.
The Rengoku sword in Blox Fruits grants access to two exceptionally powerful combat techniques capable of delivering multiple damage instances to opponents, applying stun effects, and neutralizing their instinct abilities. Mastery of these moves transforms combat encounters, particularly in Player versus Player scenarios.
Move Set Analysis:
Advanced Combo Techniques: Chain Flame Cyclone into Blazing Slash for devastating damage sequences. The pull effect sets up perfectly for the dash-and-strike combination, often eliminating opponents before they can recover.
The weapon demonstrates particular effectiveness against specific racial types due to its innate mechanics. Shark race users suffer increased damage from the flame-based attacks, while Cyborg opponents find their mechanical enhancements less effective against the sword’s instinct-breaking properties. For broader weapon strategies, consult our comprehensive BF6 Weapons Unlock Guide covering various armament types.
While the Rengoku sword arrives fully functional upon acquisition, maximizing its potential requires strategic upgrade implementation through mastery progression and complementary equipment selection.
Mastery Progression: As with all Blox Fruits weapons, the Rengoku benefits from mastery level increases that enhance damage output and reduce cooldown periods. Dedicated training against high-health enemies like Sea Beasts or in Colosseum matches accelerates mastery gains significantly.
Optimization Approach: Pair the Rengoku with fruits that complement its close-quarters combat style, such as Dark or Flame fruits. These combinations create synergistic effects that amplify the sword’s inherent strengths. For character build guidance, explore our detailed BF6 Class Selection Guide for specialized loadout recommendations.
PvP Application: In player combat, the Rengoku’s instinct-breaking capability proves invaluable against opponents relying on dodging or counter-attack strategies. The stun effect creates openings for follow-up attacks or strategic repositioning.
Understanding these advanced mechanics is crucial for maximizing your combat effectiveness. Our Battlefield 6 Complete Guide offers additional insights into advanced gameplay systems and mechanics.
Action Checklist
- Reach level 700+ and access Second Sea’s Ice Castle
- Farm Hidden Key from Awakened Ice Admiral (recommended) or Arctic Warrior/Snow Lurker NPCs
- Locate hidden room left of red carpet under castle stairs
- Open concealed chest to claim Rengoku sword
- Practice moveset combinations and upgrade through mastery
No reproduction without permission:Tsp Game Club » How to Get Rengoku in Blox Fruits Complete guide to obtaining and mastering the legendary Rengoku sword in Blox Fruits Second Sea
