If you’ve reached the point where normal fighting styles feel weak, then you’re exactly where the game wants you to be.
Because this is where Moon Slayer comes in.
It’s one of the most powerful and visually insane fighting styles in Sailor Piece. But unlocking it is not simple. It’s a full grind that forces you to farm one of the toughest bosses in the game repeatedly.
Let’s go step by step so you don’t waste time figuring things out.
How to Unlock Moon Slayer in Sailor Piece
Moon Slayer can only be unlocked on the Boss Island by interacting with a specific NPC and submitting multiple rare materials.
And here’s the important part…
Almost every required item comes from the Moon Slayer boss itself.
All Requirements to Unlock Moon Slayer
Before you even think about unlocking it, you need to collect all of these:
| Requirement | Amount | How to Get |
|---|---|---|
| Moon Crest | 1 | Drop from Moon Slayer boss |
| Crescent Shard | 4 | Drop from Moon Slayer boss |
| Lunar Essence | 9 | Drop from Moon Slayer boss |
| Demon Remnant | 16 | Drop from Moon Slayer boss |
| Upper Seal | 25 | Dropped by enemies |
| Gems | 37,500 | Farming / grinding |
| Title | Six-Eyed Demon | Defeat Moon Slayer boss |
So basically, you’ll be farming the same boss again and again until everything drops.
Drop Rates (Important Reality Check)
These are the drop chances on normal difficulty:
• Moon Crest → ~0.30%
• Crescent Shard → ~0.70%
• Lunar Essence → ~3.08%
• Demon Remnant → ~8.91%
This is why most players feel stuck here.
You are expected to grind.
SEE ALSO:
- Sailor Piece Spec Passive Guide (All Passives, Unlock Method & Best Picks)
- How to Get Phantasm Core in Sailor Piece
- How to Get Soul Flame in Sailor Piece
- Sailor Piece Enchant Guide (All Materials, Upgrades & Best Tips)
- (11) All Sailor Piece Runes & How to Get Them (April 2026)
How to Summon Moon Slayer Boss
Before farming anything, you need to summon the boss.
Step 1: Go to Boss Island
Use a portal to reach Boss Island.
Step 2: Talk to Boss Summoner NPC
Interact with the NPC near spawn.
Step 3: Select Moon Slayer
Scroll and choose Moon Slayer boss.
Step 4: Submit Materials
To spawn the boss in normal mode, you need:
| Requirement | Amount |
|---|---|
| Upper Seal | 1 |
| Money | 700,000 |
| Gems | 700 |
You can also increase difficulty for better drop chances, but it will cost more.
How to Defeat Moon Slayer Boss
This is not a beginner fight.
The Moon Slayer boss has extremely high HP and deals serious damage.
To handle it properly:
• Use high DPS builds
• Equip strong swords or fighting styles
• Use powerful devil fruits
• Upgrade your skill tree and ascension
If you try to rush this with a weak build, you’ll just waste time.
Moon Slayer Moveset (What You Unlock)
Once you finally unlock it, this is where things get fun.
Moon Slayer gives you aggressive, flashy, high-damage abilities.
Basic Attacks (M1)
Fast slashes with crescent moon effects.
Z Move
Forward slash followed by a spinning attack.
X Move
Combo slashes that transition into continuous forward attacks.
C Move
Launches enemies and creates area damage with crater effects.
V Move
A cinematic attack that destroys enemies in front of you.
F Move (Locked Initially)
Creates a domain and unleashes multiple slashes, ending with a powerful strike.
How to Unlock Moon Slayer F Move
The F move is not available immediately.
You need to unlock it separately.
Requirements for F Move
| Requirement | Amount |
|---|---|
| Moon Crest | 2 |
| Crescent Shard | 10 |
| Upper Seal | 85 |
| Clan | Upper Clan |
You also need to have Moon Slayer equipped.
Once you have everything, interact with the F move NPC on Boss Island to unlock it.
Best Strategy to Unlock Moon Slayer Faster
Most players slow themselves down here.
If you want to speed things up:
Focus on Damage First
The faster you kill the boss, the more runs you complete.
Farm in Groups
Boss HP is massive. Playing solo takes too long.
Increase Difficulty (If Possible)
Better drop rates, but only if your build can handle it.
Stack Luck Boosts
Use:
• Titles
• Clans
• Races
• Accessories
Even small boosts help over long farming sessions.
Stock Upper Seals
You don’t want to stop farming because you ran out of summon materials.
Is Moon Slayer Worth It?
Yes, easily one of the best fighting styles in the game.
It gives you:
• Strong AoE damage
• Fast clearing ability
• High boss damage
• Clean animations and control
If you are serious about late-game progression, this is not optional.
FAQs
Is Moon Slayer hard to get?
Yes. Mainly because of low drop rates and boss grinding.
Where is Moon Slayer located?
On Boss Island, both the boss and NPC are there.
Do higher difficulties help?
Yes, but they require more resources and stronger builds.
Is Moon Slayer better than other styles?
For late game and farming, it is one of the best.
Final Thoughts
Moon Slayer is not something you unlock casually.
It’s a grind-heavy milestone that tests your build, patience, and efficiency.
But once you get it…
Everything changes.
Farming becomes faster. Boss fights become easier. And your overall gameplay feels way smoother.
If you stay consistent and farm smart instead of randomly, you’ll unlock it much faster than most players.
Ankit kumar is a Digital Marketing Manager and a fan of the COD franchise and Roblox. Perfection is his forte, and the same can be seen in his work. He loves to invest his time in creating awesome content, doing SEO and discovering the latest games.