Dungeons in Sailor Piece offer some of the best rewards in the game, including rare runes, high-tier loot, and fast experience gains. Unlocking them requires completing a two-part questline that involves collecting puzzle pieces scattered across multiple islands and defeating a set number of bosses. Once unlocked, you gain permanent access to multiple dungeon types, each with distinct mechanics and rewards.
Quick answer: Reach level 5000, travel to Dungeon Island, accept the Dungeon Discovery quest from the Dungeon Master NPC, collect all six Ancient Puzzle Pieces from Starter Island, Jungle Island, Desert Island, Snow Island, Shibuya Station, and Hueco Mundo, then defeat any 25 bosses to unlock dungeons permanently.
Requirements to Start the Dungeon Quest
Before you can begin the Dungeon Discovery quest, you must reach level 5000. This level requirement is mandatory and cannot be bypassed. Once you hit level 5000, teleport to Dungeon Island and locate the Dungeon Master NPC near the center of the island, close to the portal area. Interact with the NPC and accept the Dungeon Discovery quest to begin.
The quest consists of two objectives: collecting six Ancient Puzzle Pieces hidden across different islands, and defeating 25 bosses anywhere in the game. You must complete the puzzle collection first before the boss objective becomes available.
All 6 Ancient Puzzle Piece Locations
The six puzzle pieces are spread across six islands. You can collect them in any order, but following an efficient route saves time. The recommended path is: Starter Island → Jungle Island → Desert Island → Snow Island → Shibuya Station → Hueco Mundo.
Puzzle Piece #1: Starter Island
On Starter Island, locate the house with a red roof on the right side of the island, opposite the Katana merchant. Walk behind this house to find the first puzzle piece on the ground. Interact with it to collect it.
Puzzle Piece #2: Jungle Island
After teleporting to Jungle Island, head left toward the edge of the island. Follow the line of rocks along the left edge, then turn right. The second puzzle piece sits at the base of one of the rocks. Walk up to it and interact to collect.
Puzzle Piece #3: Desert Island
On Desert Island, move toward the largest pyramid directly in front of the teleporter. Walk behind the pyramid and continue to the left corner of the island, near the bedrock edge. The third puzzle piece is placed on a rock in this corner.
Puzzle Piece #4: Snow Island
Teleport to Snow Island and walk straight ahead to the two igloos in front of the teleporter. Go behind the second igloo on the right side. You will see two large trees near a pond. The fourth puzzle piece is located at the base of the second tree, the one closer to the wall.
Puzzle Piece #5: Shibuya Station
At Shibuya Station, head to the left side of the island where the Sukuna boss spawns. Jump onto the roof of the building where Sukuna appears. From that roof, jump again to the roof of the building on the right. The fifth puzzle piece is hidden in a narrow gap between the two buildings.
Puzzle Piece #6: Hueco Mundo
Teleport to Hueco Mundo and move to the center of the island. Climb to the roof of the building with a dome structure, located directly behind the Aizen boss spawn point. Once on the roof, walk behind the dome to find the sixth and final puzzle piece.
After collecting all six pieces, return to the Dungeon Master NPC on Dungeon Island to turn in the first part of the quest.
Defeat 25 Bosses Quest
Once you hand in the six puzzle pieces, the Dungeon Master gives you the second objective: defeat 25 bosses. Any boss in the game counts toward this total, including repeated kills of the same boss. World bosses, summoned bosses, and mob bosses all contribute to the count.
The fastest method is to use the Boss Summoner on Boss Island. Summon a boss you can defeat quickly—ideally in under one minute. Mid-tier bosses like Saber are good choices if your damage output is solid. Avoid high-difficulty bosses unless you need their drops at the same time, as they slow down the quest significantly.
Repeated kills of the same boss count, so you can summon and defeat the same enemy 25 times if that is the most efficient option for your build. Once you defeat 25 bosses, return to the Dungeon Master NPC to complete the quest and unlock dungeons permanently.
How to Get Dungeon Keys
Dungeon Keys are required to enter any dungeon. Each key is consumed on use, so you need a fresh key for every run. Keys drop from world bosses and have varying drop rates depending on the boss. They can also drop from chests scattered across the game world.
The best bosses to farm for Dungeon Keys are:
| Boss Name | Drop Chance |
|---|---|
| Alucard | 33% |
| Aizen | 30% |
| Sukuna / Jinwoo / Ichigo | 20% |
| Gojo / Qin Shi | 15% |
| Saber | 10% |
Focus on Alucard and Aizen for the highest drop rates. Build a stockpile of keys before starting long dungeon sessions to avoid interrupting your farming rhythm.
How to Enter Dungeons
After unlocking dungeons and obtaining at least one Dungeon Key, travel to Dungeon Island. Interact with the dungeon portal to open the spawn menu. Select the dungeon type you want to enter and press the Spawn button. The key in your inventory will be consumed immediately, and you will be transported into the dungeon.
If you die or disconnect during a dungeon run, the key is lost, and you will not be able to re-enter that instance. Plan your runs carefully and ensure your build is strong enough to survive the waves before committing a key.
All Dungeon Types in Sailor Piece
Sailor Piece features three main dungeon types, each with different mechanics, enemy compositions, and rewards. Choose the dungeon that matches your current goals and build strength.
| Dungeon Type | Waves | Boss Presence | Key Features | Best Use Case |
|---|---|---|---|---|
| Shadow Dungeon | 15 | Yes (Wave 5, 10, 15) | Standard combat dungeon with mixed enemies like Raiders, Commanders, and Knights | Balanced farming with boss rewards |
| Rune Dungeon | 15 | No | Every enemy has a chance to drop runes | Best for upgrading builds and steady farming |
| Double Dungeon | Varies (Harder scaling) | Not specified | Stronger enemies with higher durability and damage | Late-game players looking for better rewards |
Shadow Dungeon
Shadow Dungeon consists of 15 waves with boss encounters at waves 5, 10, and 15. Enemies include Raiders, Commanders, and Knights, with increasing difficulty as you progress. This dungeon is ideal for players who want a mix of wave clearing and boss farming. The boss drops at waves 5, 10, and 15 can include rare items and materials.
Rune Dungeon
Rune Dungeon has 15 waves but no boss encounters. Every enemy in this dungeon has a high chance to drop runes, making it the most efficient option for farming upgrade materials. If your goal is to improve your build through rune upgrades, prioritize this dungeon over the others. The steady drop rate ensures consistent progress without relying on rare boss spawns.
Double Dungeon
Double Dungeon features stronger enemies with higher health and damage output. The exact number of waves varies and scales harder than the other two dungeons. This dungeon is designed for late-game players with strong builds who can handle tougher encounters. The rewards are better than Shadow or Rune Dungeons, but the difficulty increase is significant.
Efficient Dungeon Farming Tips
Dungeons are designed for repetition, so optimizing your approach saves time and resources. Use area-of-effect (AoE) abilities for wave clearing instead of single-target attacks. If your build struggles with groups, runs will feel slow and risky. Focus on abilities that hit multiple enemies, reduce cooldowns where possible, and avoid heavy, slow attacks that leave you exposed.
Build a stockpile of Dungeon Keys before starting long sessions. Running out of keys mid-session forces you back into boss farming and breaks your rhythm. Spend time farming high-drop bosses like Alucard or Aizen first, then begin your dungeon grind in one continuous session.
For the 25-boss quest, repeat easy bosses you can defeat in under a minute. Use the Boss Summoner on Boss Island and spam a mid-tier boss like Saber. Fighting stronger bosses only slows down quest progress unless you need their drops at the same time.
Prioritize Rune Dungeon for steady upgrades. Every enemy has a chance to drop runes, so progress feels consistent instead of luck-based. Save the best items from your runs to improve your build further.
Avoid dying late into dungeon runs. Losing at higher waves wastes both time and a Dungeon Key. After wave 10, enemies hit harder, and mistakes become costly. Play more carefully, manage your cooldowns, and do not rush fights when your health is low.
How to Know Dungeons Are Unlocked
After defeating 25 bosses and returning to the Dungeon Master NPC, the quest will complete. You will receive confirmation that dungeons are now permanently unlocked. The dungeon spawn menu on Dungeon Island becomes accessible, allowing you to select and enter any dungeon type as long as you have a Dungeon Key in your inventory.
If the spawn menu does not appear, verify that you completed both quest objectives: all six puzzle pieces collected and 25 bosses defeated. If you are missing either objective, the menu will not activate.