How to Get Corrupt Crown in Sailor Piece (June 2026)
If you are grinding through Sailor Piece and wondering how to get Corrupt Crown, you have found the right guide. The Corrupt Crown is one of the rarest and most sought-after Mythical materials in the game, and getting your hands on it requires understanding the exact boss mechanics, drop rates, and farming strategies that most players struggle with. In this article, I will walk you through everything you need to know to start farming Corrupt Crown effectively.
What Is Corrupt Crown in Sailor Piece?
The Corrupt Crown is a Mythical-tier material that drops exclusively from the Corrupted Knight boss in Sailor Piece. This item sits at the top of the late-game material hierarchy, making it incredibly valuable for both progression and trading with other players.
Contents
You need Corrupt Crown for two major purposes: crafting the Corrupted Excalibur weapon and completing Ascension 10 upgrades. The community has established trading ratios around this item, with players often swapping multiple Corrupt Crowns for other high-value materials like Corruption Cores.
How to Get Corrupt Crown in Sailor Piece?
Getting Corrupt Crown follows a clear process that involves traveling to the right location, summoning the correct boss, and defeating it to receive the drop. Here is the step-by-step breakdown.
Step 1: Farm a Dark Grail First
Before you can even attempt to fight for Corrupt Crown, you need a Dark Grail. This is a mandatory prerequisite for summoning the Corrupted Knight. Dark Grails drop from the standard Knight boss, which is easier to defeat and can be found at Boss Island alongside the corrupted version.
Set aside some time to farm the Dark Grail first, as entering the boss fight without it means wasted resources and no chance at the Corrupt Crown drop.
Step 2: Travel to Boss Island
Boss Island is the central hub for all high-level boss encounters in Sailor Piece. Open your map and make your way there. The island sits in the middle of the ocean and requires some swimming or boat travel depending on your current location.
Step 3: Find the Boss Summoner NPC
Once you arrive at Boss Island, locate the Boss Summoner NPC. This character stands near the center of the island and handles all boss summons. Interact with them to access the summoning menu.
Step 4: Spend Resources to Summon the Corrupted Knight
The summoning costs are significant, so make sure you come prepared:
- 1x Dark Grail
- 650,000 in-game Money
- 650 Gems
These requirements are fixed and non-negotiable. Without all three resources, you cannot summon the Corrupted Knight. Consider this when planning your farming sessions.
Step 5: Defeat the Corrupted Knight
The Corrupted Knight has approximately 750,000,000 HP, making this one of the toughest fights in the entire game. This is a damage sponge fight where you need consistent, high damage output over an extended period.
Build up your damage stats before attempting this fight. Haki upgrades, strong weapons, and proper stat allocation all contribute to how quickly you can burn through the boss HP pool.
Step 6: Wait for the Drop
After defeating the Corrupted Knight, the game rolls for the Corrupt Crown drop. The drop rate sits at approximately 0.59%, which means this is genuinely one of the rarest items in the game.
Corrupt Crown Drop Rate and Corrupted Knight Details
The Corrupted Knight boss drops the Corrupt Crown at roughly a 0.59% chance per kill. With a boss health pool of 750 million HP, each attempt represents a significant time and resource investment.
Based on probability, players typically need around 150 to 200 boss kills on average to receive a single Corrupt Crown. However, luck plays a massive role, and some players have received it in under 50 attempts while others have gone 500+ runs without seeing it.
The Corrupted Knight does not have any special phases or mechanics beyond raw HP. Your goal is straightforward: deal as much damage as possible while staying alive.
Best Tips to Farm Corrupt Crown Faster
Use a Private Server
Private servers offer significant advantages when farming the Corrupted Knight. You maintain full control over spawns, allowing you to continuously fight the boss without competing with other players for resources or drops.
Many dedicated farmers recommend renting a private server specifically for boss grinding. The time saved from not waiting on public servers easily justifies the cost.
Group Farming for Damage Scaling
Boss damage scales positively with more players contributing. If you can organize a group of 2-4 players with strong damage builds, your kill times will drop dramatically compared to solo farming.
Coordinate with friends or join a Sailor Piece Discord community to find reliable farming partners. The efficiency gains from group play make a real difference over hundreds of runs.
Focus on Damage Build First
Before committing to serious Corrupt Crown farming, invest in your damage output. Higher crit rates, stronger Haki abilities, and optimized weapon choices all reduce the number of attempts needed to eventually see the drop.
Many players make the mistake of jumping straight into Corrupted Knight farming with an underdeveloped build, resulting in 30+ minute kill times that drain resources faster than progress.
What Is Corrupt Crown Used For?
Corrupted Excalibur Crafting
The primary use for Corrupt Crown is crafting the Corrupted Excalibur. This legendary weapon requires multiple Mythical materials including Corrupt Crown and Corruption Cores. The exact crafting recipe demands several rare drops, making Corrupt Crown one of the linchpin materials for the weapon.
Ascension 10 Upgrades
Ascension 10 represents the final tier of character progression in Sailor Piece, and Corrupt Crown plays a role in these top-level upgrades. You need three Corrupt Crowns specifically for the Ascension 10 process, which adds additional incentive to farm multiples rather than trading away your first drop.
Trading with Other Players
Given its rarity, Corrupt Crown carries significant trading value. The community has established trading ratios where one Corrupt Crown can fetch multiple Corruption Cores or other high-tier materials. If you receive a duplicate Corrupt Crown, trading is a viable option to accelerate other aspects of your progression.
Frequently Asked Questions
What is the Corrupt Crown drop rate in Sailor Piece?
The Corrupt Crown has approximately a 0.59% drop rate from the Corrupted Knight boss, making it one of the rarest items in the game.
How do I get Corrupt Crown in Sailor Piece?
You must defeat the Corrupted Knight boss at Boss Island. First, farm a Dark Grail from the standard Knight boss, then spend the Dark Grail plus 650,000 Money and 650 Gems to summon the Corrupted Knight.
Where is Corrupt Crown obtained in Sailor Piece?
Corrupt Crown is obtained exclusively from the Corrupted Knight boss, which can be summoned at Boss Island using the Boss Summoner NPC.
What is Corrupt Crown used for in Sailor Piece?
Corrupt Crown is used for crafting Corrupted Excalibur and completing Ascension 10 upgrades. It is also highly valued for trading with other players.
How many runs for Corrupt Crown in Sailor Piece?
Based on the 0.59% drop rate, players typically need 150 to 200 runs on average. However, due to the random nature of drops, some players get it in under 50 attempts while others may need 500 or more.
Conclusion
Getting Corrupt Crown in Sailor Piece is a test of patience and persistence. The 0.59% drop rate from the Corrupted Knight means most players will need well over 100 attempts before seeing their first drop. Focus on upgrading your damage build first, secure a Dark Grail, and head to Boss Island to face the Corrupted Knight.
Whether you use Corrupt Crown for the Corrupted Excalibur, save it for Ascension 10, or trade it for other materials, knowing how to get Corrupt Crown in Sailor Piece puts you ahead of most players who skip this grueling but rewarding grind. Stay consistent, consider private server farming, and good luck with your drops.
