10 Ways to Get Boss Keys in Sailor Piece

What are Boss Keys, and how do you get them? They’re a required item for some boss battles in Sailor Piece, but not all. The Blessed Maiden boss fight requires a completely different item – the Tempest Relic.

Sailor Piece Boss Keys

An important item when farming boss rewards, with quite a few obtainment methods.

• Last checked for new obtainment methods on the 9th of April, 2026

How to Get a Boss Key

To get a Boss Key, you need to complete quests given by Quest NPC 1 to Quest NPC 10, which includes:

• Quest NPC 1
  • Location: Starter Island
  • Quest: Thief Hunter (level 0 to level 99)
• Quest NPC 2
  • Location: Starter Island
  • Quest: Thief Boss (level 100 to level 249)
• Quest NPC 3
  • Location: Jungle Island
  • Quest: Monkey Hunter (level 250 to level 499)
• Quest NPC 4
  • Location: Jungle Island
  • Quest: Monkey Boss (level 500 to level 749)
• Quest NPC 5
  • Location: Desert Island
  • Quest: Bandit Hunter (level 750 to level 999)
• Quest NPC 6
  • Location: Desert Island
  • Quest: Desert Bandit Boss (level 1,000 to level 1,499)
• Quest NPC 7
  • Location: Snow Island
  • Quest: Frost Rogue Hunter (level 1,500 to level 1,999)
• Quest NPC 8
  • Location: Snow Island
  • Quest: Winter Warden Boss (level 2,000 to level 2,999)
• Quest NPC 9 
  • Location: Shibuya Station
  • Quest: Sorcerer Hunter (level 3,000 to level 3,999)
• Quest NPC 10
  • Location: Shibuya Station
  • Quest: Panda Sorcerer (level 4,000 to level 5,000)

Boss Keys are an Epic rarity drop, so they’re not too common, meaning they aren’t always a guarantee.

What Are Boss Keys Used For?

The clue is in the name, as Boss Keys are used to summon bosses. You can only do this by visiting Boss Island and speaking to the Boss Spawner NPC. When interacting with them, you are required to exchange Boss Keys to summon specific bosses.

As of right now, there are three bosses to summon this way:

Saber

• 1x Boss Key
• 100K Gold
• 170 Gems

Saber has a total of 2.5 million HP and, upon defeat, has a chance to drop the following rewards:

• Boss Ticket
  • 100% drop chance
• Race Reroll
  • 40% drop chance
• Haki Color Reroll
  • 25% drop chance
• Dungeon Key
  • 10% drop chance
• Blade Master (Title)
  • 5% drop chance
• Saber Armor
  • 5% drop chance
• Saber (Sword)
  • 2% drop chance

Qin Shi

• 3x Boss Keys
• 250K Gold
• 400 Gems

With 10 million HP, defeating Qin Shi grants a chance to get these rewards:

• Boss Ticket 
  • 100% drop chance
• Haki Color Reroll
  • 75% drop chance
• Race Reroll
  • 50% drop chance
• Trait Reroll
  • 40% drop chance
• Dungeon Key
  • 15% drop chance
• Jade Tablet
  • 6% drop chance
• Imperial Seal
  • 2% drop chance
• Qin Shi Blindfold
  • 2.5% drop chance
• King of Beginning (Title)
  • 1.5% drop chance

Ichigo

• 5x Boss Keys
• 350K Gold
• 600 Gems

Out of these three bosses, Ichigo has the highest HP at 65 million. He has a chance to drop:

• Boss Ticket
  • 100% drop chance
• Haki Color Reroll
  • 85% drop chance
• Race Reroll
  • 80% drop chance
• Trait Reroll
  • 60% drop chance
• Dungeon Key
  • 20% drop chance
• Soul Fragment
  • 6% drop chance
• Hollow Mask
  • 2% drop chance
• Spiritual Core
  • 1.75% drop chance
• Soul Flame
  • 0.7% drop chance
• Soul Reaper (Title)
  • 1% drop chance

Boss Keys are separate from Boss Tickets, as the latter is a form of currency that you can spend when speaking to the Boss Token Exchange NPC. Boss Tickets are used to purchase:

• Qin Shi (Melee) for 250x Boss Tickets
• Saber (Sword) for 65x Boss Tickets
• Ichigo (Sword) for 500x Boss Tickets

Adele Wilson

Editor

With experience working for GameRant and in SEO copywriting, Adele loves to combine her adoration for gaming with her writing craft. She'll talk your ear off about anything fantasy, and if she's not typing away at her desk, she's probably playing an RPG somewhere, watching anime, or reading a book.