Reaper Keys have quickly become one of the most valuable items in Sailor Piece after the release of the Ghoul Update. Without them, players cannot summon the Black Reaper boss on Isolation Island, which means no Black Reaper materials, no rare drops, and no progress toward unlocking the powerful new melee style.
The problem is that Reaper Keys currently have an extremely low drop rate, making them one of the biggest grind walls in the entire update.
Here is the fastest known way to farm Reaper Keys in Sailor Piece.
Sailor Piece Reaper Key Farming Guide – How to Get Keys
Reaper Keys are required to summon the Black Reaper boss on Isolation Island.
Summon Costs
Normal Difficulty
- 1 Reaper Key
Extreme Difficulty
- 4 Reaper Keys
Since keys are consumed every summon, farming them efficiently is extremely important if you plan to grind the boss repeatedly.
Isolation Island Access
Before farming Reaper Keys, players must first unlock Isolation Island.
This requires completion of the Blood Flower Quest.
Blood Flower Requirement
You need to collect:
- 6 Blood Flowers across C2
After finishing the quest, the new island becomes accessible.
Ghoul Masters
The main source of Reaper Keys is the Ghoul Master enemy.
Enemy Location
Ghoul Masters spawn around:
- Wooden bridges
- Walkways
- Arena pathways
- Elevated sections of Isolation Island
These enemies are currently the best farming target for Reaper Keys.
Drop Rate Problems
One of the biggest complaints from players right now is the extremely low Reaper Key drop chance.
Compared to older boss summon items in Sailor Piece, Reaper Keys seem far rarer.
Many players believe:
- The drop rate may be intentionally low
- The drop chance could be bugged
- Farming takes significantly longer than older updates
Because of this, efficient farming routes matter much more than usual.
Fastest Farming Method
The current best strategy focuses on maximizing Ghoul Master kills per minute.
Farm Near Bridges
Most Ghoul Masters appear clustered near:
- Wooden bridge sections
- Arena walkways
- Central island paths
These areas allow fast enemy chaining without excessive movement.
Use AoE Builds
Specs with wide-area attacks clear Ghoul Masters much faster.
Strong farming options include:
- Large AoE melees
- Fast cooldown abilities
- Crowd-control focused builds
The faster you clear enemies, the better your chances of getting keys consistently.
Farm With Teams
Group farming is currently one of the best ways to improve efficiency.
Advantages include:
- Faster enemy respawns
- Shared clearing speed
- Less downtime
- More overall kills
Because the drop rate is so low, kill speed matters more than almost anything else.
Extreme Boss Farming
Although the Extreme version of the Black Reaper boss costs more keys, many players still prefer it.
Why Players Farm Extreme
- Better farming value
- More rewarding drops
- Faster overall material progression
- Better late-game efficiency
However, if your build is weak, Normal mode may still be the safer option.
Farming Tips
Stay in Smaller Servers
Less crowded servers usually mean:
- Faster mob access
- Less competition
- More consistent farming rotations
Stack Mobility
Movement abilities help rotate between Ghoul Master spawns quickly.
Save Keys
Avoid wasting keys on failed summons, especially on Extreme difficulty.
Prepare Long Sessions
Due to the low drop rate, expect Reaper Key farming to take time unless developers increase the chances later.
Black Reaper Progression
Reaper Keys are only one part of the Black Reaper grind.
After summoning the boss, players still need materials including:
- Black Shards
- Reaper Remnants
- Rinkaku Cores
- Ghoul Essences
- One-Eyed King Title
- 65K Gems
This makes efficient key farming even more important in the long run.
Right now, Reaper Keys are arguably the biggest grind bottleneck in Sailor Piece. The Ghoul Master enemies on Isolation Island are currently the best farming source, but the low drop rates mean players should expect a long grind before summoning the Black Reaper boss multiple times.
Still, if you are aiming for Black Reaper melee, farming Reaper Keys is a step you cannot avoid.