What to know
- You must already own the Shadow Sword before attempting the Atomic Sword unlock.
- All required materials are primarily farmed on Lawless Island through NPCs and the Atomic Boss.
- Summoning the Atomic Boss consumes Abyss Sigils, making farming efficiency crucial.
- The Eminence Incarnate Title and 45,000 Gems are mandatory alongside crafting materials.
The Atomic Sword in Sailor Piece stands out as one of the most demanding yet rewarding weapons you can unlock. If you’re aiming to add it to your arsenal, you’ll need patience, a strong build, and a consistent farming routine. The entire process revolves around Lawless Island, where you’ll repeatedly farm enemies and challenge the Atomic Boss until you gather everything required. This isn’t a quick unlock—you should expect multiple runs and a steady grind before completion.
| Requirement Type | Details |
|---|---|
| Base Weapon | Shadow Sword |
| Main Location | Lawless Island |
| Key Boss | Atomic Boss |
| Currency Needed | 45,000 Gems |
| Title Requirement | Eminence Incarnate |
| Core Farming Resource | Abyss Sigil |
| Crafting NPC | Atomic NPC |
All materials required for the Atomic Sword
To unlock the Atomic Sword, you must gather a complete set of materials along with progression-based requirements.
| Material Name | Quantity Required |
|---|---|
| Atomic Omen | 1 |
| Eminence Essence | 3 |
| Shadow Remnant | 9 |
| Magic Shard | 16 |
| Abyss Sigil | 80 |
| Gems | 45,000 |
| Title | Eminence Incarnate |
| Base Weapon | Shadow Sword |
Every requirement listed above is mandatory, meaning you cannot craft the weapon unless all conditions are fulfilled.
How to unlock Atomic Sword in Sailor Piece
Lawless Island serves as the central farming zone where you will spend most of your time grinding for the Atomic Sword. You’ll begin by defeating NPC enemies scattered across the island to collect Abyss Sigils, which are essential both as a crafting material and as a currency to summon the Atomic Boss.
Once you have enough Sigils, you can interact with the Atomic Boss Summoner NPC to spawn the boss, with each summon costing one Sigil. The Atomic Boss is the primary source of rare drops like Atomic Omen, Eminence Essence, and other required materials, but since drops are not guaranteed, you will need to defeat the boss multiple times.
As you continue this loop of farming NPCs for Sigils and repeatedly summoning the boss, you gradually accumulate all required materials.
After collecting everything, including the required Gems, title, and Shadow Sword, you return to the Atomic NPC on Lawless Island to exchange your materials and unlock the Atomic Sword.
Rewards and benefits of Atomic Sword
| Reward Type | Details |
|---|---|
| Weapon Power | High-tier damage output |
| Rarity | Endgame-level weapon |
| Combat Impact | Strong against bosses and PvE |
| Progression | Marks late-game achievement |
The Atomic Sword is considered a late-game weapon that significantly improves your overall combat performance.
Best strategies to speed up the grind
Efficiency plays a huge role in unlocking the Atomic Sword faster. You should focus on farming Abyss Sigils consistently before attempting multiple boss runs so that you never run out of summoning resources.
Server hopping can help you reset enemy spawns and maintain a steady farming pace, while using a strong build ensures faster NPC clears and shorter boss fights.
Playing with other players can further speed up the process, especially during boss encounters where coordinated damage makes a noticeable difference.
