How to Get the Shadow Monarch Sword in Sailor Piece (March 2026)

If you are chasing the most powerful weapon in Sailor Piece, the Shadow Monarch Sword is the endgame goal you have been looking for. Inspired by Sung Jin Woo from the Solo Leveling anime, this Mythical-tier sword delivers explosive damage with fast attacks and devastating shadow abilities that dominate both PvP and PvE content.

In this guide, I will walk you through exactly how to get the Shadow Monarch Sword in Sailor Piece, including all prerequisites, material requirements, NPC locations, drop rates, and farming strategies. This process takes most players 1-2 weeks of consistent grinding, but the result is absolutely worth it.

What Is the Shadow Monarch Sword?

The Shadow Monarch Sword is currently the strongest weapon in Sailor Piece. It deals massive damage per hit with incredibly fast attack animations, making it perfect for players who run Weapon-stat builds. The sword features four unique abilities (Z, X, C, V) that chain together for explosive combos in both boss fights and PvP scenarios.

This weapon sits at the top of the Sailor Piece sword tier list, competing with other Mythical swords like Rimuru and Ragna. What sets Shadow Monarch apart is its consistent damage output, AoE capabilities, and synergy with the Slime race, which boosts sword damage by 40%. If you want to learn more about alternatives, check out our guide on how to get Ragna sword in Sailor Piece.

Prerequisites: You Must Get Jinwoo Sword First

Before you can even think about obtaining the Shadow Monarch Sword, you need to acquire the Jinwoo Sword first. This is a hard requirement and cannot be skipped. The Jinwoo Sword serves as the foundation for unlocking the Shadow Monarch upgrade.

Where to Find the Jinwoo NPC

The Jinwoo Trainer NPC is located on Sailor Island. Look for him standing near the main spawn area. When you approach him, he will offer you a series of quests that must be completed before you can purchase the Jinwoo Sword.

All 5 Jinwoo Quest Requirements

Speaking to the Jinwoo NPC triggers a quest chain with five specific objectives. Here is what you need to complete:

Quest 1: Kill 100 NPCs in any location.

Quest 2: Deal 10 million damage total to any enemies.

Quest 3: Kill 250 NPCs.

Quest 4: Deal 25 million damage total.

Quest 5: Kill 750 NPCs and deal 75 million damage total.

These quests take significant time to complete. Most players spend 3-5 days just on the Jinwoo quest chain alone. I recommend grinding in high-density NPC areas and focusing on bosses for maximum damage output.

Jinwoo Sword Purchase Requirements

After completing all five quests, you can purchase the Jinwoo Sword from the same NPC. Here is the full cost breakdown:

Money: 2,500,000

Gems: 7,500

Abyss Edge: 1

Dark Ring: 1

Shadow Heart: 1

If you are short on gems, grab some freebies from our Sailor Piece codes for free gems and money. Codes can save you hours of grinding.

How to Get the Shadow Monarch Sword in Sailor Piece

Once you have the Jinwoo Sword equipped, you can begin the process of upgrading to the Shadow Monarch Sword. This involves traveling to a new location, finding a hidden NPC, and gathering rare materials from the Shadow Monarch boss.

Step 1: Reach Dungeon Island

The Shadow Monarch NPC is located on Dungeon Island. To access this area, you need to be at least level 5000. If you are not there yet, continue grinding quests and boss fights until you hit the requirement.

Travel to Dungeon Island by using the fast travel system or sailing from the main islands. The dungeon entrance is clearly marked on the map.

Step 2: Find the Shadow Monarch NPC Location

Once on Dungeon Island, head to the main dungeon chamber. The Shadow Monarch NPC is not inside the dungeon itself. Instead, climb up to the roof of the dungeon chamber building. The NPC stands in the left corner of the roof area.

Many players miss this NPC because they expect him to be at ground level. Look up and climb the structure to find him waiting for you.

Step 3: Gather Required Materials

Before the NPC will sell you the Shadow Monarch Sword, you need to collect several rare materials. These drop exclusively from the Shadow Monarch boss inside the dungeon. Here is the complete list:

Monarch Core: 1 required

Monarch Essence: 3 required

Kamish Dagger: 1 required

Shadow Crystal: 1 required

King of Shadows Title: 1 required

Money: 5,000,000

Gems: 15,000

Combined with the Jinwoo Sword costs, you are looking at a total investment of 7.5 million money and 22,500 gems. This is why I mentioned the 1-2 week grind timeline earlier.

Step 4: Purchase the Shadow Monarch Sword

With all materials in your inventory and the Jinwoo Sword equipped, speak to the Shadow Monarch NPC on the roof. Select the purchase option, confirm the transaction, and the Shadow Monarch Sword will be added to your weapon inventory.

Material Farming Guide: How to Get Each Drop

The hardest part of obtaining the Shadow Monarch Sword is farming the rare materials. All required items drop from the Shadow Monarch boss, but the drop rates are low and heavily RNG-dependent.

Shadow Monarch Boss Spawn Times

The Shadow Monarch boss spawns inside the Dungeon at specific wave intervals. You can find him appearing at Wave 5, Wave 10, and Wave 15. Each spawn gives you a chance to defeat him and collect drops.

I recommend running the dungeon repeatedly on the highest difficulty you can handle. Higher difficulty levels significantly improve drop rates.

Drop Rates by Difficulty

Here is how difficulty affects your chances of getting rare materials:

Normal Difficulty: 0.5% to 1.5% for rare items

Hard Difficulty: 2% to 4% for rare items

Expert Difficulty: 4% to 8% for rare items

Inferno Difficulty: 6.75% to 12% for rare items

As you can see, running Inferno difficulty more than doubles your drop rate compared to Normal. If you can handle the harder content, always choose the highest difficulty available.

How to Get Monarch Core

The Monarch Core is the rarest drop from the Shadow Monarch boss. With a base drop rate of around 6.75% on Inferno difficulty, most players need 15-20 boss kills to obtain one. Some unlucky players report needing 100+ kills.

Focus on efficient dungeon runs. Skip unnecessary fights and rush to the boss waves. Team up with other players to clear waves faster and maximize your attempts per hour.

How to Get King of Shadows Title

The King of Shadows Title is another rare drop with a similar drop rate to the Monarch Core. This title is required for the Shadow Monarch purchase and cannot be traded between players.

Keep grinding the Shadow Monarch boss on the highest difficulty you can manage. The title will eventually drop, but patience is essential.

Shadow Monarch Sword Skills and Abilities

Once you obtain the Shadow Monarch Sword, you gain access to four powerful abilities that make this weapon dominant in combat.

Z Attack: A fast horizontal slash that deals moderate damage with quick animation. Use this as your primary combo starter.

X Attack: A thrust attack that pierces through enemies. Great for hitting multiple targets in a line.

C Attack: An AoE shadow explosion around your character. Deals heavy damage to all nearby enemies.

V Attack (Ultimate): The signature Shadow Monarch ultimate. Summons shadow soldiers that attack all enemies in range for massive damage. This ability has a longer cooldown but can clear entire rooms.

The sword excels in both PvP and PvE scenarios. Fast attacks make it easy to stunlock opponents in PvP, while the AoE abilities shred through dungeon waves and boss health bars.

Tips and Best Builds for Shadow Monarch

To maximize the Shadow Monarch Sword potential, you need the right build and race combination.

Best Race: Slime

The Slime race is the best choice for Shadow Monarch users. Slime race provides a 40% boost to all sword damage, which stacks with the already high base damage of the Shadow Monarch Sword. This combination is why Slime/Shadow Monarch is considered the meta build for weapon users.

If you are not Slime race, consider using a race reroll to change. The damage difference is significant enough to justify the reroll cost.

Stat Build Recommendations

Focus your stat points into Weapon stat. This directly scales your sword damage and maximizes the effectiveness of the Shadow Monarch abilities. A pure Weapon build with minimal investment in other stats will give you the highest damage output.

Farming Efficiency Tips

Team up with 2-3 other players for dungeon runs. A coordinated group can clear waves 3-4 times faster than solo players. Share boss kills and rotate who gets the drops to ensure everyone progresses.

For endgame players looking to expand their abilities beyond weapons, check out our guide on Domain Expansion abilities in Sailor Piece.

FAQ’s

Conclusion

Getting the Shadow Monarch Sword in Sailor Piece requires dedication, patience, and significant resource investment. You must first complete the Jinwoo quest chain and purchase that sword, then farm the Shadow Monarch boss on Dungeon Island for rare materials like Monarch Core and King of Shadows Title.

The total cost of 7.5 million money, 22,500 gems, and weeks of farming may seem daunting. However, the result is the most powerful weapon in the game that dominates PvP and shreds through endgame PvE content. For players committed to a Weapon-stat build, the Shadow Monarch Sword is the ultimate goal worth pursuing.

Start by grinding those Jinwoo quests, use codes to boost your gem count, and team up with other players for efficient dungeon runs. The grind is long, but the power you gain makes every hour worth it.