Follow These Quick Tips to Get Rengoku in Blox Fruits

A complete walkthrough to unlock the coveted sword

Written by Darlene Antonelli, MA

Last Updated: July 15, 2024 Fact Checked

Are you looking to get the legendary sword Rengoku in Blox Fruits? It's a fairly straightforward process, but since the RNG (random number generator) plays a part in whether or not a key drops for you, getting the sword can take no time at all or a few days of grinding. This wikiHow tutorial shows you how to get Rengoku in Blox Fruits.

Quickly Getting Rengoku in Blox Fruits

Get the Hidden Key from the boss or NPCs, then go down the stairs below the Awakened Ice Admiral. Walk through a wall next to the stairs to find a chest. Touching the chest with the Hidden Key in your inventory will reward you with Rengoku.

Steps

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1
Get the Hidden Key. You can do this in two ways^{[1]
X
Research source}:
- Defeat the Awakened Ice Admiral in the Ice Castle within Second Sea^{[2]
  X
  Research source},
- Kill Arctic Warriors and Snow Lurkers, both of which are in the Ice Castle in Second Sea^{[3]
  X
  Research source}.
- Arctic Warriors and Snow Lurkers have a lower chance of dropping the Hidden Key but are at lower levels than the Awakened Ice Admiral.
- Increase your chances of getting the key quickly by purchasing a 2x Boss Drops gamepass.
2
Open the chest. Go down the stairs in the Awakened Ice Admiral's spawn room and head to the right of the red carpet. You can walk through a wall in line with the stairs and find the chest containing Rengoku.
- You get two moves with Rengoku equipped: Demon Slayer and Burning Slash, both of which break Instinct (or Observation Haki). They are single-target attacks, so you can't damage multiple enemies simultaneously.
- You can upgrade Rengoku at the Blacksmith in First or Second Sea with 8 Vampire Fangs, 20 Magma Ore, and 15 Scrap Metal.

Community Q&A

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Question

Where can I get the Magma Core?

Noodle Worthy

Top Answerer

You can obtain the Magma Core by defeating the Magma Admiral in the Magma Village, located in the First Sea.

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Question

Which NPCs should I defeat to obtain Rengoku?

Noodle Worthy

Top Answerer

To acquire Rengoku, you first need the Hidden Key. You can obtain this key by defeating any NPC at the Frozen Castle island, though the drop rate from regular NPCs is very low. For a significantly higher chance, it is recommended to server hop and defeat the Awakened Ice Admiral, as this boss has a much better key drop rate.

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Question

How can I get the Acidium rifle?

Noodle Worthy

Top Answerer

You can obtain the Acidium rifle by successfully completing factory raids in the Second Sea. While you don't need to inflict the most damage, you must contribute to and defeat the factory raid.

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Tips

Since this sword breaks Instinct, other players can't consistently use Observation Haki against you. ^{[4]
X
Research source}

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The best tactic for fighting Awakened Ice Admiral is to stay out of melee range and attack from a distance. Many of his strongest attacks are melee attacks, so avoid those. You also want to stay off the ground when he uses his "Absolute Zero" skill, which freezes the ground and anything on it. Luckily, there are stairs that you can use to get off the floor.

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