Some weapons in Sailor Piece are simple pickups… and then there’s the Atomic Sword. This one is a full grind package—materials, boss farming, sigils, and even titles. If you don’t know the loop, it can feel confusing fast. So here’s everything broken down cleanly.
Where to Get Atomic Sword
Head over to Lawless Island.
- Find the Atomic Sword NPC
- This NPC shows all required materials
- Once you have everything → you can craft/unlock the sword
Atomic Sword Requirements
This is what you’ll need:
- Eminence Incarnate Title
- Shadow
- 45,000 Gems
- 1 Atomic Omen
- 3 Eminence Essence
- 9 Shadow Remnants
- 16 Magic Shards
- 80 Abyss Sigils
Yeah… it’s a lot. This is not meant to be quick.
Where All Materials Come From
Almost everything comes from one main source:
Atomic Boss
- Drops key materials like:
- Atomic Omen
- Eminence Essence
- Shadow Remnants
- Magic Shards
So your main grind loop revolves around spawning and defeating this boss repeatedly.
How to Spawn the Atomic Boss
You can’t just walk in and fight it.
You need:
Abyss Sigils
- Used at the Atomic Boss Summoner
- Cost: 1 sigil per summon
There’s also an Extreme Mode:
- Costs more sigils
- Better drop chances
If you’re serious about farming efficiently, Extreme mode is worth it.
How to Get Abyss Sigils Fast
This is the real bottleneck.
Farm Arena Fighters
- Found on Lawless Island
- They drop Abyss Sigils
Best Approach:
- Grind these enemies in bulk
- Stack sigils
- Then summon bosses repeatedly
This creates a loop:
Arena Fighters → Sigils → Boss → Materials → Repeat
Most players slow themselves down here. Do this instead:
Step-by-Step Loop:
- Farm Arena Fighters until you have a good amount of sigils
- Go to Atomic Boss Summoner
- Use sigils (prefer Extreme if possible)
- Kill the boss
- Collect drops
- Repeat
One of the requirements is:
Eminence Incarnate Title
This likely comes from:
- Arena progression
- Boss-related achievements
So while farming sigils and bosses, you’re also progressing toward this requirement naturally.