Headband (Black) Blox Fruits: bonuses, how to obtain

The ultimate headband of the Sharkman Master, summarized by its in-game quote, « Perfect control, endless depth. » : +16% reduction on all damage types, +70% movement speed, +7% Melee damage and an additional Instinct dodge. It's the best versatile defense an accessory can offer, and it opens the Secret Technique in the bargain, which lets you swing the fish you've caught like weapons. Interestingly: despite all that, the game only ranks it as Uncommon.

How to get it

You obtain it by training with the Sharkman Master, and the path is long:

Defeat the Tyrant of the Skies to access Submerged Island.
Raise Sharkman Karate to 500 Mastery.
Achieve a 100% critical rate in Fish Battles against the Sharkman Master.

Equipment bonuses

+7% Melee Damage
+70% Movement Speed
+16% all Damage Reduction
+1 Extra Instinct Dodge

Secret Technique

The Headband (Black) unlocks the Secret Technique: you can use the fish you've caught as weapons.

The principle mirrors the finisher of the Fish Slap Battle move, except here you use it freely, anywhere.

The projection depends on the rarity of the fish used.
The weight of the fish has no effect.
Some moves can still be used during the charge-up animation to pull someone towards you (the Spikey Trident [X], for example).

Bonus details

Bonus	Value
Reduction on all damage types	+16%
Movement speed	+70%
Melee damage	+7%
Additional Instinct dodge	+1

Warning: these bonuses do not appear when you talk to the Nerd. To see them in-game, go to the Builds section of your inventory.

Good to know

Its Uncommon rarity is unusually low given what it offers.
Cosmetic detail: the headbands in the game don't respect the true traditions of karate, where the headband doesn't serve to mark a rank.
All headbands are poorly fitted on the head, they stick out at the edges.
The accessory arrived with Update 27.3.

Strengths and weaknesses

The best versatile defensive bonuses of all accessories: 16% reduction against all damage types
An additional Instinct dodge
+70% movement speed, nearly on par with the Bandana and Hunter Cape
+7% Melee damage, a solid contribution for a defensive accessory
Unlocks the Secret Technique, usable freely anywhere

Extremely difficult to obtain: Tyrant of the Skies, then Sharkman Karate at 500 Mastery, then 100% critical rate in Fish Battles
No health or energy bonus
Its speed bonus, even at this level, is still outpaced by other accessories
Its bonuses do not appear at the Nerd: you need to verify them in the Builds section of your inventory

Our take

Monstrous in defense and speed: the perfected version of Headbands, reserved for the most dedicated.

Update history

Accessory : Headband (Black)·Released : Update 27.3

Update 27.3 vers septembre 2025 Release
- Added Headband (Black) to the game.
See update 27.3
Update 30 17 octobre 2026 Adjustment
- Secret Technique: on 17 October 2026 the source page added that some moves can still be used during the charge-up animation to pull an opponent towards you, with the Spikey Trident [X] as the example. The page mirrors that line.
See update 30

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