Getting the New Kokushibo Spec in Sailor Piece Roblox: Moon Slayer Guide

If you’re trying to get the new Kokushibo spec in Sailor Piece Roblox, the update centers on Moon Slayer. This late-game fighting style is tied to a boss grind, a title requirement, and a set of crafting materials that you’ll need to collect before you can buy it.

The process is straightforward, but it is not quick. You’ll need to farm boss summons, chase a rare title drop, and gather enough Upper Seals for both unlocking and mastery.

What the new Kokushibo spec is in Sailor Piece

Moon Slayer is the Kokushibo-inspired spec added in the Moon update. It is a melee-style fighting spec, even though it has a blade-like appearance.

Players are drawn to it for two big reasons:

It looks like one of the most polished specs in the game
It has strong late-game damage potential, especially after unlocking its full kit

It is not a sword item, so don’t treat it like a normal weapon purchase. You’ll need to unlock it through the correct NPC with the right materials equipped.

Requirements to get Moon Slayer

Before you can obtain Moon Slayer, you need to bring the required items to the Moon Slayer NPC on Boss Island.

Requirement	Amount	How to get it
Six-Eyed Demon Title	1	Dropped from Moon Slayer boss
Gems	37,500	Quests, bosses, chests, and other normal gameplay
Moon Crest	1	Dropped from Moon Slayer boss
Crescent Shard	4	Dropped from Moon Slayer boss
Lunar Essence	9	Dropped from Moon Slayer boss
Demon Remnant	16	Dropped from Moon Slayer boss
Upper Seal	25	Drops from enemies

The biggest bottlenecks are usually:

Six-Eyed Demon Title
Moon Crest
Upper Seals

Those are the parts that can slow down the grind the most.

Where to find the Moon Slayer NPC

Head to Boss Island and look for the Moon Slayer trainer NPC on the side opposite the spawn point, facing the water.

Once you have all required materials, interact with the NPC to buy the spec.

How to summon the Moon Slayer boss

The Moon Slayer boss is also on Boss Island, using the boss summon system there.

A normal summon costs:

1 Upper Seal
700,000 Money
700 Gems

The boss has very high health, so players farming it solo should expect a long run if their build is not strong enough yet.

Best difficulty for farming

If your goal is farming materials, normal difficulty is usually the safest and most repeatable option. Higher difficulties can improve rare drop chances, but they also use more summon materials and take longer unless your damage is already very high.

Difficulty	Best for	Notes
Normal	Farming materials	Easier and cheaper to repeat
Extreme	Rare drop hunting	Better if you can kill fast and spare summon materials

How to farm Upper Seals faster

Upper Seals drop from enemies across the game, but higher-level areas are the best place to farm them.

Good farming areas include:

Ninja Island
Lawless Island
Shinjuku

These areas are useful because enemies respawn quickly and are strong enough to make farming worthwhile.

Ways to improve Upper Seal farming

Method	Effect
Higher-level farming zones	Better seal farming efficiency
Luck-based races	Improve your overall luck
Luck runes	Boost drop luck
Strong clan rolls	Add more luck and damage
Titles and gear	Can help with drop chance and farming speed

If you already have a strong damage build, farming in a high-density zone is usually the fastest path.

Moon Slayer move list

Players who tested the spec found that it has a strong melee kit with flashy ranged-looking effects and heavy damage potential.

Keybind	Move type	Notes
Z	Forward slash combo	Gap-closing style attack
X	AoE slash	Good for hitting groups
C	Wide AoE attack	Strong for mob clearing
V	Cutscene-style finisher	Big visual attack
F	Unlockable mastery move	Requires extra steps

The F move is not available immediately. You need to complete the mastery unlock first.

How to unlock the F move

To unlock the Moon Slayer F move, you need to talk to the correct mastery NPC and bring additional items.

Reported unlock requirements include:

Upper Clan
Moon Slayer equipped
2 Moon Crest
10 Crescent Shard
85 Upper Seal

After completing the unlock, the spec gains an F move and a permanent damage boost tied to that mastery step.

Why the clan roll matters

The new update also adds a clan option that can help the grind.

The Upper Clan is especially valuable because it gives a mix of damage, HP, melee damage, luck, and a chance-based damage boost on skill use.

Clan	Notable effects
Upper Clan	Damage, HP, melee damage, luck, and a chance to gain extra damage
Other high-end clan options	May offer different damage or utility bonuses

If you’re farming Moon Slayer, a strong clan can make a noticeable difference in both boss kills and material drops.

Tips for getting Moon Slayer faster

Here are the most useful ways to speed up the grind without overcomplicating it:

Farm Upper Seals first so you do not stop mid-grind
Keep your luck setup on while farming lower enemies
Run the boss on the difficulty you can clear consistently
Save rare materials like Moon Crest instead of spending them early
Check your clan and spec setup before switching to boss farming
If you want the F move, plan for the extra Upper Seals in advance

A lot of the grind is about patience. If you spend everything as soon as you get it, you’ll usually end up having to backtrack later.

Is Moon Slayer worth getting?

For melee players, yes. Moon Slayer is one of the most interesting specs in Sailor Piece right now, especially if you like flashy attacks and boss-focused damage.

It also gives you a clear long-term goal:

Farm the materials
Get the title
Unlock the spec
Master the F move
Improve your clan and build around it

If you already enjoy farming bosses and optimizing drops, Moon Slayer is a solid update target.

Quick checklist

Use this checklist to stay organized while farming:

Farm Upper Seals
Summon Moon Slayer boss
Chase Six-Eyed Demon Title
Collect Moon Crest, Crescent Shard, Lunar Essence, and Demon Remnant
Buy Moon Slayer from the NPC
Unlock the F move with the required mastery materials
Recheck your clan and damage setup