The Strongest Shinobi is a shinobi-themed melee fighting style added to Sailor Piece with the Massive Update. It draws heavily from Madara Uchiha in Naruto, featuring fast strikes, shadow clones, and a Susano'o ability. Unlocking it requires farming a specific boss on Ninja Island, collecting several rare materials, earning a title, and handing over 40,000 Gems to an NPC seller.
Quick answer: Talk to the Strongest Shinobi Seller NPC on Ninja Island after collecting 40,000 Gems, 1 Path Fragment, 3 Eternal Cores, 8 Battle Sigils, 15 Power Remnants, and the Battlefield Warlord title — all dropped by the Strongest Shinobi Boss (Moa) on the same island.
Strongest Shinobi Requirements
You purchase the fighting style from the Strongest Shinobi Seller NPC. To reach the NPC, open any Teleport Portal, scroll to the bottom of the destination list, and select Ninja Island. After spawning, walk straight toward the giant tree, then turn left. The seller stands near the base of the tree.
You must have every item below in your inventory before the NPC will let you complete the exchange.
| Requirement | Amount | Drop Source & Rate |
|---|---|---|
| Gems | 40,000 | Quests, chests, boss kills, codes |
| Path Fragment | 1 | Strongest Shinobi Boss — 0.40% |
| Eternal Core | 3 | Strongest Shinobi Boss — 1.01% |
| Battle Sigil | 8 | Strongest Shinobi Boss — 2.12% |
| Power Remnant | 15 | Strongest Shinobi Boss — 3.69% |
| Battlefield Warlord (Title) | 1 | Strongest Shinobi Boss — 1.5% (100 pity) |
Strongest Shinobi Boss Location and Spawn Timer
The boss — sometimes called Moa — spawns on Ninja Island at the far end opposite the teleport spawn point. A floating timer marks the exact spawn location, so you won't need to search. After the boss is defeated, it respawns automatically six minutes later. When it appears, an on-screen pointer directs you to its position.
Moa has 2,000,000,000 HP. Defeating it can yield a wide range of loot beyond the required crafting materials.
| Drop | Notes |
|---|---|
| Money, XP, Gems | Standard rewards every kill |
| Race Reroll / Trait Reroll | Guaranteed bonus drops |
| Boss Ticket | Guaranteed bonus drop |
| Dungeon Key | Guaranteed bonus drop |
| Power Remnant | 3.69% chance |
| Battle Sigil | 2.12% chance |
| Eternal Core | 1.01% chance |
| Path Fragment | 0.40% chance |
| Void Reaver (Artifact Set) | Rare drop |
| Battlefield Warlord (Title) | 1.5% chance, 100-kill pity |
Only the Battlefield Warlord title has a pity system. Every other material drop is purely RNG, so expect a significant grind — especially for the Path Fragment at 0.40%.
Farming Tips for the Strongest Shinobi Boss
Because the boss respawns on a six-minute timer, you can chain kills on a single server without hopping. Bring an AoE-heavy build (a strong existing fighting style like Gilgamesh or Strongest in History works well) to burn through the 2 billion HP pool faster. Grouping with other players speeds up each kill considerably.
Server hopping is still useful if you want to find a boss that's already spawned and skip the wait. Switch servers, check the far end of Ninja Island for the timer or the boss itself, and jump in immediately if it's active.
For the 40,000 Gems, the most efficient approach is to combine quest completions across multiple islands with boss farming. Chests earned from quests can also drop Gems, and redeeming active Sailor Piece codes provides a quick boost.
Crafting the F Move
The Strongest Shinobi has a craftable F move that sits on top of the base moveset. It adds a significant damage increase and is well worth the extra farming.
Step 1: Find the crafting NPC on Ninja Island. It's a separate NPC from the seller.
Step 2: Press E to open the craft menu.
Step 3: Submit the required materials — the Warlord item, Eternal Cores, and Battle Sigils. All of these drop from the same Strongest Shinobi Boss, so you'll accumulate them alongside the materials needed for the base unlock.
The F move is technically optional, but skipping it means leaving a large chunk of the fighting style's damage potential unused.
Maxing Out the Strongest Shinobi
After unlocking the fighting style and crafting the F move, there are several ways to push its damage further.
| Upgrade Path | Details |
|---|---|
| Blessings | Upgrade from B4 up to B10 for scaling stat boosts |
| Passives | Spin for a passive on Judgement Island — Executioner is best for raw damage, Fortune for a damage-and-luck hybrid |
| Stat Points | Invest heavily into the Melee stat to increase all move damage |
| Title | Equip the Battlefield Warlord title for a synergy bonus with this fighting style |
No mastery quests are required. Once you obtain the Strongest Shinobi, every move in its kit is immediately available.
Buying the Strongest Shinobi With Robux
If you'd rather skip the boss grind entirely, the Strongest Shinobi is available in the in-game shop as part of a Massive Update bundle priced between 2,399 and 3,349 Robux. The bundle also includes the Atomic Weapon and Abyssal Empress, so you get three new items in a single purchase.
Is the Strongest Shinobi Worth the Grind?
The Strongest Shinobi sits comfortably in the top tier of Sailor Piece fighting styles. It can match or outperform previously dominant specs like Gilgamesh and Blessed Maiden in both PvP and boss farming. The moveset is visually distinct — every ability has a unique animation — and the damage output is strong even before full blessings or passive optimization.
The main cost is time. The Path Fragment's 0.40% drop rate alone can take dozens of kills, and collecting eight Battle Sigils at 2.12% adds up. Still, guaranteed bonus drops like Dungeon Keys, Boss Tickets, and rerolls mean each kill provides value beyond just chasing the rare materials. If you're looking for a late-game melee investment in Sailor Piece, the Strongest Shinobi is one of the strongest options currently in the game.