The Moon Slayer stands out as a coveted late-game fighting style in Sailor Piece. Acquired from a specific NPC on Boss Island, this style captivates players with its striking visuals. However, obtaining it requires a significant commitment in the form of various materials, presenting a challenge that many gamers are eager to tackle.
Unlocking the Moon Slayer in Sailor Piece
To unlock the Moon Slayer fighting style, players must venture to Boss Island, home to both the NPC for this style and the formidable Moon Slayer boss. Here’s a detailed list of the essential items required for unlocking this flashy combat technique:
- Six-Eyed Demon Title: Acquired by defeating the Moon Slayer boss.
- 37, 500 Gems: A requisite currency for the unlock process.
- 1 Moon Crest: Drops at a rare 0.30% chance upon defeating the Moon Slayer boss.
- 4 Crescent Shards: With a 0.70% drop rate, these items are also earned from the boss.
- 9 Lunar Essence: These have a slightly better drop rate at 3.08% from the same boss.
- 16 Demon Remnants: Earning a drop chance of 8.91% from the Moon Slayer boss.
- 25 Upper Seals: Can be collected by defeating any enemy in Sailor Piece.

The specified drop rates apply to summoning the Moon Slayer boss in normal difficulty. Increasing the difficulty level enhances the drop rates for each item, albeit at the cost of requiring more summoning materials like Upper Seals and cash.
Summoning and Defeating the Moon Slayer Boss
The Moon Slayer boss is renowned as one of the most challenging adversaries in Sailor Piece, boasting a staggering 1.25 billion HP in normal mode. To summon this formidable foe, navigate to Boss Island and interact with the Boss Summoner NPC.
Locate the Moon Slayer boss option in the NPC’s menu and present the necessary items: 1 Upper Seal, 700, 000 money, and 700 gems. Players confident in their strength can also opt for an auto-spawn feature if equipped with sufficient items.


Given the Moon Slayer’s immense health pool, players need an arsenal of potent Devil Fruit powers, advanced fighting styles, and top-tier weaponry. Additionally, enhancing your skill tree and unlocking superior races, clans, and titles will critically boost your damage output against this powerful enemy.
Moveset of the Moon Slayer Fighting Style
The Moon Slayer’s combat style is visually represented by a sword-like weapon, setting it apart from traditional swords in Sailor Piece. Its attack pattern includes a series of powerful slashing movements, making it a unique addition to your fighting repertoire. Below is the comprehensive moveset:
- M1 Attack: Delivers fierce slashes embedding crescent moon particles.
- Z Key: Executes a dual-action move that begins with a forward slash and follows up with a somersault attack.
- X Key: Engages with two initial slashes, finishing with a series of forward slashes.
- C Key: Lifts enemies and creates purple craters in the vicinity.
- V Key: Triggers a dramatic cutscene move that devastates mobs with a single powerful strike.
- F Key: Forms a black zone around the player, unleashing rapid slashes, culminating in a fierce forward attack.
Unlocking the Moon Slayer F Move
The F move represents a unique ability that’s locked when first acquiring the Moon Slayer fighting style. To unlock this additional power, gather the following materials:
- Ensure you have the Upper Clan equipped.
- Possess the Moon Slayer fighting style.
- Collect 2 Moon Crests.
- Gather 10 Crescent Shards.
- Obtain 85 Upper Seals.

To acquire the Upper Clan, consider rerolling clans in Sailor Piece and engage with challenging foes for Upper Seals. The remaining items can be collected from defeating the boss. Once all materials are ready, visit the NPC located on the higher structure on the right side of Boss Island. Interact with the NPC, submit the items, and unlock the F move at last!
That’s an extensive guide on unlocking the Moon Slayer fighting style in Sailor Piece, including its movesets. Are there any other fighting styles or weapons you’re currently pursuing in the game? Share your experiences in the comments!
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