Achieving the highest level in Sailor Piece means you’re ready to claim one of the game’s ultimate weapons: the Shadow Monarch sword. Renowned for its exceptional damage output and quick cooldowns, this blade is ideal for experienced players keen on rapidly dispatching bosses and mobs alike. This guide will walk you through everything you need to know about obtaining the Shadow Monarch sword and maximizing its potential.
Obtaining the Shadow Monarch Sword
The Shadow Monarch sword is obtainable from the Shadow Monarch Trainer NPC located on Dungeon Island. Before attempting to acquire this powerful weapon, it is advisable to complete the Jinwoo questline and acquire the Jinwoo Sword. Once prepared, ascend to the rooftop of the Dungeon building and interact with the NPC. To unlock the Shadow Monarch sword, you will need the following items:
- Jinwoo Sword
- King of Shadows Title (6.75% to 12% drop chance from Shadow Monarch Boss)
- 10 Monarch Cores (0.8% to 1.15% drop chance from Shadow Monarch Boss)
- 5 Monarch Essences (2.75% to 6.5% drop chance from Shadow Monarch Boss)
- 2 Kamish Daggers (0.75% to 1.4% drop chance from Shadow Monarch Boss)
- 1 Shadow Crystal (2.75% to 6.5% drop chance from Shadow Monarch Boss)

The Shadow Monarch is among the most formidable bosses in Sailor Piece, situated within a double dungeon that adds to the challenge of farming. To optimize your chances against this boss, ensure you are equipped with the best loadout from our Sailor Piece Tier List.
To enhance your drop rates, consider increasing the difficulty level of the double dungeon. Alternatively, lower difficulty levels can be attempted, but the drop quality may suffer. Additionally, redeem Sailor Piece codes for additional rewards to boost your resources.
Shadow Monarch Sword: Stats and Abilities
As the pinnacle of swords in Sailor Piece, the Shadow Monarch sword boasts an impressive damage multiplier, rapid cooldowns, and a wide area of effect (AOE), making it the weapon of choice for late-game players. Below are the specifics of its various moves:
| Key Bind | Description | Stats |
|---|---|---|
| M1 | Basic attack | TBA |
| WITH | Medium-range slice attack culminating in a dash | TBA |
| X | Summons a statue dealing continuous fire damage | TBA |
| C | Small AOE attack inflicting significant damage | TBA |
| In | Delivers a series of rapid slashes across a large area, causing substantial damage | TBA |
| F | Unleashes infinite purple slashes with a cinematic effect + 30% total damage increase (requires completion of Shadow Monarch Mastery quest) | TBA |
Completing the Shadow Monarch Mastery Quest
After acquiring the Shadow Monarch sword, you can initiate the Shadow Monarch Mastery quest. This begins by interacting with the Shadow Monarch Mastery NPC, who is located near the Jinwoo Trainer NPC on Sailor Island. Successfully completing this quest will unlock the F move for the Shadow Monarch as well as grant a 30% damage boost.

The questline comprises three distinct tasks:
- Dungeon Master: Clear 10 Double Dungeons on Hard or Extreme difficulty.
- Monarch’s Blood: Join the Monarch Clan.
- Shadow Army: Defeat 25 Shadow Soldiers within the dungeon.
Prior to embarking on the Double Dungeons, it’s advisable to equip a Sailor Piece Devil Fruit and any Sailor Piece Haki to maximize damage output efficiently. The Shadow Soldiers, while rare, will appear as you progress towards completing your quest requirements. Additionally, obtaining membership in the Monarch clan may necessitate numerous clan rerolls, often around 100 attempts, given its Legendary status.
Are you ready to pursue the Shadow Monarch sword? Share your thoughts with us in the comments below!
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