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To get the Core Brain in Blox Fruits, first insert a Fist of Darkness into the Secret Laboratory chamber on Hot and Cold, then defeat Order in Order raids until the item drops. Current Blox Fruits Wiki documentation lists a 5% chance per eligible defeat. Use the Core Brain at the chamber to open the secret room, then speak to the NPC and pay 2,500 Fragments to unlock Cyborg.
What you need before farming Order
- A Fist of Darkness to activate the Core Brain puzzle at the Secret Laboratory.
- A Microchip from Arlthmetic to start an Order raid at Hot and Cold.
- Access to Order raids. You can join another player’s raid; you do not have to host it.
The Fist of Darkness insertion is saved as puzzle progress, so you do not need to repeat it after leaving the area. The current Blox Fruits Wiki Cyborg/Puzzle page, updated September 28, 2026, describes this prerequisite and the unlock sequence.
How to get the Core Brain
- Take a Fist of Darkness to the Secret Laboratory on Hot and Cold.
- Insert it into the raid chamber. Wait for the in-game message confirming that the prerequisite has been processed and that a Core Brain is needed.
- Get a Microchip from Arlthmetic, then use it to start an Order raid. The Blox Fruits Wiki Order page, updated September 28, 2026, lists Arlthmetic as the Microchip source and Hot and Cold as the raid location.
- Defeat Order and repeat the raid until the Core Brain drops. The current puzzle documentation lists a 5% chance per eligible defeat after the Fist prerequisite has been recorded. This is a chance, not a guaranteed drop after a set number of raids.
The 5% figure is also listed on the Blox Fruits Wiki Core Brain entry. An older search result gave a different figure, but the current puzzle documentation states 5%; treat it as the wiki’s current estimate rather than an official developer guarantee.
How to use the Core Brain to unlock Cyborg
- Return to the Secret Laboratory chamber on Hot and Cold with the Core Brain.
- Use the item at the chamber to open the secret room.
- Speak to the NPC inside and pay 2,500 Fragments to unlock the Cyborg race.
The 2,500-Fragment cost and unlock steps are listed on the Cyborg/Puzzle page.
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Common points of confusion
- Order is the source: the Core Brain comes from defeating Order, not from buying or crafting it.
- Activate the puzzle first: inserting the Fist of Darkness is required before eligible Order defeats can drop the Core Brain.
- You can join instead of host: the player seeking the Core Brain does not need to start the raid themselves.
- Keep the unlock steps in order: get the drop, use it at the chamber, enter the secret room, then speak to the NPC and pay the Fragment cost.
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