Rain slicked the Dungeon Island roof as I handed over the Jinwoo Sword and held my breath. You can feel the game change the moment the trade completes — runs become faster, mobs fall cleaner. That click of a new blade in your hands is the line between scraping by and steamrolling content.
Your inventory feels heavier when one item seals a run — How to Obtain Shadow Monarch in Sailor Piece
I’ll be blunt: this is a late-game chase. You get the Shadow Monarch by trading with the Shadow Monarch Trainer NPC on the Dungeon Island roof, but you won’t just walk up empty-handed.
Before you visit the trainer, finish the Jinwoo questline and secure the Jinwoo Sword. That’s the ticket. Then climb to the top of the Dungeon building and speak to the NPC. The full item list the trainer wants:
- Jinwoo Sword
- King of Shadows Title (6.75–12% chance Shadow Monarch boss drop)
- 10 Monarch Core (0.8–1.15% chance Shadow Monarch boss drop)
- 5 Monarch Essence (2.75–6.5% chance Shadow Monarch boss drop)
- 2 Kamish Dagger (0.75–1.4% chance Shadow Monarch boss drop)
- 1 Shadow Crystal (2.75–6.5% chance Shadow Monarch boss drop)
The Shadow Monarch boss lives inside the double dungeon, so expect long runs and low drop rates. Ramp the double dungeon difficulty if you want better drop percentages; lower difficulty will save time but will hurt your chances. If you need visuals or route ideas, YouTube creators and Twitch streamers have short clips that show route optimizations faster than trial-and-error.
How do you obtain Shadow Monarch in Sailor Piece?
Trade the required items to the Shadow Monarch Trainer NPC on Dungeon Island after finishing the Jinwoo questline. Farming the double dungeon on Hard or Extreme will get you the pieces, but be prepared for rng and repetition.
A close fight looks obvious from the start — Shadow Monarch stats and moveset
Shadow Monarch is the current best sword in the game for late-stage players. High damage multipliers, short cooldowns, and wide AOE make it a boss-melting option.
| Key Bind | Description | Stats |
|---|---|---|
| M1 | Basic attack | TBA |
| Z | A medium-range slice attack that ends with a dash | TBA |
| X | Summon a statue that deals continuous fire damage. | TBA |
| C | Small AOE attack that deals a lot of damage | TBA |
| V | Performs a series of super speed slashes in a wide area, dealing very high damage | TBA |
| F | Deals an infinite amount of purple slashes with a very cool cutscene effect + 30% increased overall damage (complete Shadow Monarch Mastery quest) | TBA |
You’ll notice the F move is the headline—complete the Mastery quest to get it. Use the sword with a high-damage build from the Sailor Piece Tier List and slot a strong Devil Fruit and Haki for clear speed. The V sequence hits with sudden impact and strikes like a thunderclap.
Do you need the Jinwoo Sword to get Shadow Monarch?
Yes. The Jinwoo Sword is a non-negotiable prerequisite for the trade with the Shadow Monarch Trainer.
The grind feels repetitive before it becomes routine — How to Complete Shadow Monarch Mastery Quest in Sailor Piece
I finished the mastery line after dozens of double dungeon runs; every micro-win kept me going. The Mastery NPC sits where the Jinwoo Trainer is on Sailor Island, and the reward is the F move plus a permanent 30% damage increase.
The questline has three parts:
- Dungeon Master: Clear 10 Double Dungeons on Hard or Extreme difficulty.
- Monarch’s Blood: Own the Monarch Clan.
- Shadow Army: Defeat 25 Shadow Soldiers in the dungeon.
Practical tips: equip a high-damage Devil Fruit and any Haki before you farm. Shadow Soldiers spawn rarely, but you’ll pick them up while clearing Double Dungeons. The Monarch Clan is legendary and rare; expect to spend around 100 clan rerolls to secure one if luck isn’t on your side. Join the game’s Discord and follow Roblox community threads and YouTube creators for faster routes and clan-trading opportunities.
How do you get the F Move for Shadow Monarch?
Talk to the Shadow Monarch Mastery NPC on Sailor Island after you own the sword and complete the three quest steps listed above. The reward is the F move plus a 30% damage buff.
This is a rare weapon with tedious math behind the drops; you can grind or join a farm group and compare runs on Discord and YouTube clips to shave time. Will you grind the double dungeon yourself, or watch streamers flex while you chase the final piece?