I drop onto Blue Planet with an empty cache and a single plan: farm keys until the Goku style is within reach. Five Spirit Fighters sit in a quiet corner, and the map feels suddenly smaller. Every respawn and drop tightens the clock in my head.
I’ve spent hours here so you don’t have to guess. I’ll show you the exact spot, the fastest routine I use, and the small quality-of-life choices that turn a slog into steady progress. You’ll get the context, the route, and the tradeoffs—then decide how aggressive you want to be.
On Blue Planet, the Spirit Fighters cluster along the left road near the map corner
After you gain access to Sea 2, teleport to Blue Planet and follow the left-side path until you hit the secluded corner — that’s where the five Spirit Fighter NPCs wait. Defeating those NPCs is the only way to obtain Spirit Keys; the game’s patch notes single out Raid Keys for melee-only, but Spirit Keys and Spirit Stones have no such limit.
If you want to shrink grind time, stack luck. I run Cosmic Being C and the highest luck gear I can get; the difference is visible after fifteen minutes. That corner is a goldmine when your luck stat is fat.
Quick tips I use and pass on from Roblox and Discord communities:
- Farm solo for predictability, or pair up with a friend to clear faster — both have merit depending on how patient you are.
- Record a short run with OBS or clip it to upload to YouTube or Twitch if you want to study boss patterns later.
- Watch high-DPS builds on Roblox content creators to copy rotations that shave time off each spawn.
How do you get Spirit Keys in Sailor Piece?
Defeat the Spirit Fighter NPCs on Blue Planet in Sea 2. That’s the raw step. If you want a quick routine:
- Access Sea 2, teleport to Blue Planet.
- Follow the left road until you reach the corner with five Spirit Fighters.
- Rotate skills to maximize clear speed—Cosmic Being C is my go-to—and repeat until keys drop.
Near the portal, a large capsule and a named NPC mark where you spend your keys
Head back to the portal and take the right path this time. Before the big capsule stands the Spirit Warrior Summoner NPC—talk to them to open the summon menu. Spirit Keys are a passport to Goku: drop the required number and the Spirit Warrior (Goku) spawns.
Here’s the summon cost by difficulty:
- Normal: 1 Spirit Key
- Medium: 2 Spirit Keys
- Hard: 3 Spirit Keys
- Extreme: 4 Spirit Keys
Use the auto-spawn option if you’re mass-farming; it keeps pace and removes the clicks between fights. The goal is straightforward: complete the five quest chain and then defeat 50 Goku bosses to earn the Spirit Warrior fighting style.
What are Spirit Keys used for in Sailor Piece?
They summon the Spirit Warrior boss across difficulty tiers. If you want the fighting style, you must farm keys, summon, and farm the boss until the quest count (and the 50-boss requirement) is met. Community strategies—shared on Discord servers and Roblox fan groups—often split summons or trade runs to reduce time per player.
Final tactical notes from my runs: prioritize luck gear, consider short bursts of high-DPS play rather than marathon sessions, and watch a few creator clips on YouTube for boss tells you can’t see on your first dozen attempts. Are you going to grind solo until you hit the milestone, or organize a Discord crew and rotate summons to cut the time down?