Sailor Piece Dungeons Guide: All Dungeons & Rewards
Every dungeon in Sailor Piece with level requirements, rewards, boss details, and unlock steps. Master the Rune Dungeon, Boss Rush, and Double Dungeon.
Dungeons in Sailor Piece
Dungeons are instanced endgame activities that require a minimum level of 5,000 to access. Unlike the open-world boss system where all players on the server share the same bosses, dungeons are private instances that only you and up to 3 co-op partners can enter. This makes dungeons the best way to farm specific drops without competing against other players. Each dungeon requires a Key to enter — Dungeon Keys drop from the Rune Dungeon itself, and Rush Keys for Boss Rush drop from all enemies in the open world.
Dungeon Rewards Summary
Each dungeon has a distinct reward pool. Here is what each one offers:
Rune Dungeon
All 9 runes (rare drops), Dungeon Keys (uncommon). The only way to obtain runes. Higher difficulty = higher rune drop rate.
Boss Rush
Rush Coins (used in Boss Rush Shop), Sun Armor (250 Rush Coins), XP and Cash scaling with difficulty.
Double Dungeon
Monarch Armor (S-tier accessory, 0.75–1.5% drop, 140 pity), Dungeon Keys, high XP. Requires defeating Shadow Monarch boss.
Recommended Builds for Dungeons
Different dungeons favor different build approaches. Here are the recommended setups:
Rune Dungeon
Any high-damage buildThe 15-wave format rewards sustained DPS. Galevorn + Anos melee (Venuzdonoa ignores enemy defense) or SwordBlessed + Gilgamesh are the top choices. Bring a Fortune Rune if farming for a specific rune drop — the +15% Luck stacks with difficulty bonuses.
Boss Rush
Quake Fruit + Fishman (early) / Any S+ build (endgame)Boss Rush is accessible at level 1,500+, so mid-game builds are viable. Quake Fruit + Fishman is a strong early option for its AoE burst. At endgame, any S+ build clears easily. Use the Rush Coins to buy Sun Armor early — it is a significant power spike for the price.
Double Dungeon
SwordBlessed + Gilgamesh with Manipulator OutfitThe hardest dungeon, requiring endgame builds. Shadow Monarch boss fight needs high burst damage to stagger. SwordBlessed + Gilgamesh with Manipulator Outfit is the current meta pick. Co-op with 2–4 players reduces the difficulty significantly and speeds up Monarch Armor farming.
How to Unlock Dungeons
Reach Level 5000+
Dungeons are endgame content requiring at least level 5000.
Talk to the Dungeon Master NPC
Go to Dungeon Island and find the Dungeon Master NPC to start the quest chain.
Collect 6 Ancient Puzzle Pieces
Starter Island (behind white house), Jungle Island (left rock pile), Desert Island (opposite side), Snow Island (behind trees), Shibuya Station (rooftop above Sukuna), Hueco Mundo (top of dome).
Defeat 25 Bosses
Both open-world bosses and mini-bosses count toward this requirement.
Use a Dungeon Key
Dungeon Keys drop from dungeon runs. Your first key comes from completing the quest chain.
All Dungeons
Rune Dungeon
The primary dungeon in Sailor Piece, accessed via Dungeon Island after completing the Dungeon Master quest chain. Features 15 waves of enemies with a 5-minute timer per wave — players can die unlimited times and respawn before the timer ends. The Rune Dungeon is the only way to obtain Runes — powerful end-game modifiers that provide large damage, defense, luck, and special effect bonuses. Runes have levels that increase by completing more dungeon runs. Selectable difficulty: Easy, Medium, Hard, Extreme — harder difficulties yield higher rune drop rates and more XP/money.
Rewards
Boss Rush
A sequential boss fighting mode accessed via Rush Keys (dropped by all enemies in-game). Players fight wave after wave of bosses with increasing difficulty. Earn Rush Coins to purchase upgrades from the Boss Rush Shop, including the Sun Armor (+115% Defense, +87% Damage, +25% Damage Reduction when fully upgraded, costs 250 Rush Coins). Selectable difficulty: Easy, Medium, Hard, Extreme. The Boss Rush portal is located on Sailor Island.
Rewards
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).
Rewards
Infinite Tower
NEWAn endless wave-based survival gamemode released in the Massive Update (March 25, 2026). Players battle increasingly difficult waves of enemies with random debuffs every 5 floors. Features Tower Tokens (currency for upgrades), a Leaderboard system, and the 2x Luck Event bonus applies here. Buffs fixed in new servers (criss, March 30). Map built by Freakiest Builder with VFX by Zenith. Accessible to players of all levels.
Rewards
Dungeon Comparison
| Dungeon | Level | Difficulty | Boss | Time |
|---|---|---|---|---|
| Rune Dungeon | Lv. 5000+ | Very Hard | Shadow / Shadow Monarch | 10-20 minutes depending on build strength |
| Boss Rush | Lv. 1500+ | Hard | Sequential boss waves | 10-15 minutes per run |
| Double Dungeon | Lv. 5000+ | Extreme | Shadow Monarch | 15-25 minutes |
| Infinite Tower | Lv. 1+ | Extreme | N/A | Endless — survival based |