The ultimate challenge in Sailor Piece. Summoning: Defeat the Gojo Boss to obtain a Limitless Key, then talk to the Strongest Boss Summoner NPC on Shinjuku Island. Requires a full team.
| True Sukuna Finger | 1% (Mythical) |
| Heian Artifacts | 5% (Legendary) |
| Golden Ticket | 50% |
Uses Malevolent Shrine (Domain Expansion). Stay out of the red zone.
| Curse Finger (Spec Item) | 5% |
| Sukuna's Robe | 10% |
Spams Hollow Purple (Slow moving nuke) and Red (Explosive pushback).
| Mysterious Eye (Spec Item) | 10% |
| Blindfold | 15% |
HP: 6M • Sailor Island Spawns: 8m30s
Drops: Shadow Heart (3%), Shadow Dagger (5%)
HP: 12.5M • Christmas Island Spawns: 5m
Drops: Silver Comets (Crafting), Dragon Scale
HP: 10M • Boss Island
Drops: Holy Grail (5%), Excalibur Skin
HP: 40M • Raid
Drops: Slime Extract, Rimuru's Sword
HP: 85M • Boss Island Summon: Upper Seal
Drops: Moon Crests (2%), Crescent Shards (15%), Lunar Essences (35%)
HP: 60M • Boss Island Summon: Tempest Relic
Drops: Tide Remnant (9.5%), Celestial Mark (0.4%)
HP: Scales to Difficulty • Boss Island
Drops: Dark Grails, Corrupt Tyrant Title (1%)
HP: 20M • Sailor Island Spawns after Jinwoo
Drops: Blood Ring (2%), Soul Amulets (10%)
HP: 25M • Judgement Island Spawns: 7m30s
Drops: True Aizen Sword materials, Hogyoku
HP: 35M • Ninja Island
Drops: Shinobi spec materials, Ninja artifacts
| Boss | HP | Location | Spawn Time | Notable Drops |
|---|---|---|---|---|
| Kokushibo | 85M | Boss Island | Summon (Upper Seal) | Moon Crests, Crescent Shards |
| Blessed Maiden | 60M | Boss Island | Summon (Tempest Relic) | Tide Remnant, Celestial Mark |
| Corrupted Knight | Variable | Boss Island | Summon | Dark Grails, Corrupt Tyrant Title |
| Strongest of Today | 125M | Shinjuku Island | Summon (Limitless Key) | True Sukuna Finger (1%), Heian Artifacts (5%) |
| Empress | 50M | Tower Island | Summon / Spawn | Abyssal Empress Sword, Abyss Outfit |
| Atomic | 45M | Lawless Island | Summon / Spawn | Atomic Sword, Atomic Outfit |
| Strongest Shinobi | 35M | Ninja Island | Summon / Spawn | Strongest Shinobi Melee, Ninja Artifacts |
| True Aizen | 25M | Judgement Island | 7m 30s | True Aizen Sword materials |
| Aizen | 25M | Hueco Mundo | 7m 30s | Aizen Blade materials |
| Alucard | 20M | Sailor Island | Spawns after Jinwoo | Blood Ring, Soul Amulets |
| Ragna | 12.5M | Christmas Island | 5m | Silver Comets, Dragon Scale |
| Jinwoo | 6M | Sailor Island | 8m 30s | Shadow Heart (3%), Shadow Dagger (5%) |
| Sukuna | 5M | Shibuya Station | 7m 30s | Curse Finger (Spec), Sukuna's Robe |
| Gojo | 4M | Shibuya Station | 7m 30s | Limitless Key, Mysterious Eye, Blindfold |
| Yuji Boss | 3.75M | Shibuya Station | 5m | Yuji spec materials |
| Qin Shi | — | Boss Island | Summon (Boss Key) | Emperor Seal (Spec) |