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In the vibrant world of Sailor Piece, the Malevolent Key is a crucial item that players should prioritize for progression. This key is essential for reaching the end-game phases and enhancing your character’s build through valuable upgrades. This guide will provide you with comprehensive insights on how to acquire the Malevolent Key in Sailor Piece.
How to Secure the Malevolent Key in Sailor Piece
There are two primary methods to obtain a Malevolent Key, each catering to different gameplay styles. The first method involves taking on a beginner-level boss, while the second focuses on defeating mid-level Non-Player Characters (NPCs).Below, we will delve deeper into these two strategies:
1. Defeat the Cursed King Boss
The most reliable method for acquiring the Malevolent Key is by defeating the Cursed King (Sukuna) boss, found at the Shibuya Station on the Sailor Piece Map. As a world boss, the Cursed King respawns every five minutes, and players cannot hasten this process.

What’s advantageous about targeting the Cursed King is the guaranteed drop rate—defeating him results in a 100% chance to receive the Malevolent Key. Since he is classified as an easy-level boss, players can easily defeat him using the Gryphon or similar quality swords within the game.
2. Defeat Curse NPCs at Shinjuku Island
If you’re looking for a more laid-back strategy, you can opt for the second method that facilitates AFK farming of the Malevolent Key. Simply travel to Shinjuku Island and engage the Curse enemies located near the left of the portal.

These enemies also drop Malevolent Keys, albeit at a reduced rate compared to the Cursed King. The advantage of this method lies in efficient time management—while waiting for the boss to spawn can be tedious, alternating between enemy engagements allows for quicker farming. Equip an AoE damage-dealing sword or melee style to maximize effectiveness.
Maximize Your Malevolent Key Farming
Now that you’re familiar with the two main methods for acquiring Malevolent Keys, utilizing the following tips can help you farm them more efficiently:
- Optimize Your Build: Create a robust damage build in Sailor Piece to eliminate both the Cursed King and the Curse NPCs quickly.
- Server Switching: Since the Cursed King respawns every five minutes, consider switching servers to secure additional keys without waiting.
- Luck Stat Enhancement: For AFK farming, increase your Luck stat through optimal titles, clans, Spec Passives, and racials.
- Increased Drop Rates: Boost drop rates by advancing your Ascension levels, unlocking Skill Tree nodes, and equipping luck-based runes.
Utilizing the Malevolent Key in Sailor Piece
After assembling a collection of Malevolent Keys, the next step is understanding their application. Navigate to Shinjuku Island and proceed from the portal to find the Strongest Boss Summoner NPC.
Interact with this NPC by pressing and holding the ‘E‘ key, which opens a window showcasing two bosses: The Strongest of Today and The Strongest in History. Notably, summoning the Strongest in History boss requires Malevolent Keys.

When ready, submit the specified number of Keys to summon the Strongest in History boss, with the normal level requiring just 1 key, increasing for higher difficulties.
Defeating this boss is crucial, as it provides a chance to acquire Cursed Flesh, necessary for Ascension to level 7, and also unlocks Sukuna V2 within the game.
This concludes our guide on how to acquire and use the Malevolent Key in Sailor Piece. Have you managed to obtain this key and complete your Ascension? We invite you to share your experiences in the comments below.
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