Double Dungeon
An endgame dungeon featuring the Shadow Monarch boss. The Double Dungeon is one of the most challenging PvE encounters in Sailor Piece, requiring high-level gear and coordinated team play. Shadow Monarch drops the Monarch Blade accessory (0.75-1.5% drop rate, 140 pity).
Overview
- Level Required
- 5000+
- Difficulty
- Extreme
- Max Players
- 4
- Estimated Time
- 15-25 minutes
- Sea Region
- Endgame Islands
- Last Updated
- March 15, 2026
Boss
Shadow Monarch
Final boss of Double Dungeon
See the Bosses Database for detailed boss stats, drop rates, and strategies.
Rewards
Monarch Blade accessory (0.75-1.5% drop rate, 140 pity)
XP and Cash
Requirements
- 1Minimum level: 5000
- 2Complete the Dungeon Master NPC quest chain on Dungeon Island
- 3Collect all 6 Ancient Puzzle Pieces from islands across the map
- 4Defeat 25 bosses (open-world and mini-bosses both count)
- 5A Dungeon Key or Rush Key (depending on the dungeon type)
Strategy Guide
The Double Dungeon features the Shadow Monarch boss — one of the most difficult PvE encounters in Sailor Piece. The Monarch Blade accessory drops at 0.75–1.5% with a pity system at 140 kills. Plan for a significant farming session.
Recommended Preparation
- •Bring a full group of 4 players — this boss is designed for team play.
- •Use an S+ or S tier sword. Anything below A-tier will make this fight extremely long.
- •Equip your best defensive accessories for the survival check phases.
- •Track your kill count against the 140 pity — guaranteed Monarch Blade at pity.
Warning: This is Extreme difficulty content. Come at level 5000+ with Conqueror Haki trained and all puzzle pieces collected. Underprepared players will not survive the final boss phases.
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At a Glance
Quick Overview
Double Dungeon
An endgame dungeon featuring the Shadow Monarch boss. The Double Dungeon is one ...
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Related Content
All Dungeons Database
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Runes Database
All runes with bonuses, levels, and drop locations.
Bosses Database
Complete boss guide with HP, drops, and strategies.
Islands Guide
All islands with puzzle piece locations and activities.
Endgame Builds
Best builds for dungeon clearing and boss farming.
Active Codes
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Double Dungeon — Info
- Level
- 5000+
- Difficulty
- Extreme
- Max Players
- 4
- Boss
- Shadow Monarch
- Time
- 15-25 minutes
- Rewards
- 2 items
- Updated
- 2026-03-15