How To Get Moon Slayer in Sailor Piece – Requirements

Sailor Piece’s latest update doesn’t just add new content—it introduces one of the strongest melee weapons in the game right now: Moon Slayer. With massive burst damage, a powerful F move, and materials tied to the new boss, this weapon is clearly designed to dominate boss farming.

But unlocking it isn’t simple.

From farming rare drops on Lawless Island to repeatedly summoning the Moon Slayer boss, getting this weapon requires a full grind route. Here’s the fastest way to unlock Moon Slayer, how to get its F move, and whether it’s actually worth the effort.

To craft Moon Slayer, go to Boss Island and find the Moon Slayer NPC.

You’ll need:

• Six-Eyed Demon Title

• 37,500 Gems

• 1 Moon Crest

• 4 Crescent Shards

• 9 Lunar Essence

• 16 Demon Remnant

• 25 Upper Seals

This is where your grind starts.

• Go to Lawless Island

• Defeat NPCs

• Drops are low chance

You’ll need:

• 25 for crafting

• 85 more for F move later

So don’t stop early—farm a large stack.

Once you have Upper Seals:

• 750 Gems

• 1 Upper Seal

• Six-Eyed Demon Title

• Moon Crest

• Crescent Shards

• Lunar Essence

• Demon Remnant

This is the most important drop.

• +85% Damage Buff

• 155 Pity System (guaranteed eventually)

Even outside crafting, this alone is a huge upgrade.

Once you have all materials:

• Go back to Moon Slayer NPC

• Craft the melee

At this point, you already have one of the strongest weapons in the game.

To fully complete the weapon, you need the F move.

Go to Moon Slayer Master NPC (Boss Island)

• Moon Slayer Melee

• Upper Clan

• 2 Moon Crest

• 10 Crescent Shards

• 85 Upper Seals

This is a new Legendary Clan.

• +40% Damage

• +50% Max HP

• +12% Melee Damage

• +12% Luck

• You must roll for it

• Save clan rerolls before starting grind

Here’s how strong it actually is:

• ~2 Billion Damage

• Moves your character

• Better for bosses than mobs

• ~2.2 Billion Damage

• No movement → cleaner usage

• More consistent in fights

• 5+ Billion Damage

• Large AoE

• Best for mob clearing

• 10+ Billion Damage

• High burst

• Long cooldown

• 15+ Billion Damage

• Extremely high burst

• Best boss-killing skill