The Index in Sailor Piece is a collection system that counts every unique item you own across eleven gear and progression categories, then turns that running total into permanent stat buffs. The boosts apply no matter what you have equipped, and they stack on top of your weapons, artifacts, and base stats. That makes the Index one of the few systems in the game that rewards breadth instead of a single perfect build.
Quick answer: Open the Index NPC on Slayer Island in Sea 2 (left of the island entrance) or in the middle of the starter island in Sea 1, keep each collectible equipped or sitting in your inventory so it registers, and reach 200 entries to clear the original milestone set. The King update extended the rewards further, so newer milestones unlock at 205 and 215 entries.
Where to find the Index NPC
The same Index NPC appears in two fixed spots, so you never have to travel far to check your total. In Sea 2, teleport to Slayer Island, the final island, and walk to the left of the entrance. In Sea 1, the NPC stands near the center of the starter island, which keeps it within reach for new accounts. Interact with either one to open the full collection menu and browse every category.
How items register in the Index
An item only counts when it is currently equipped or held in your active inventory. Older clans, races, swords, melees, and similar unlocks from before the Index existed do not register on their own, so you have to re-equip or re-roll anything you discarded earlier. The total updates the moment a new item qualifies.
Event-exclusive specs, titles, and auras do add to the count, but none of them are required to reach the cap. Two things stay excluded: seasonal guild titles handed out through leaderboards, and certain newer event auras. If an item you own is not showing up, confirm it is equipped or in your bag rather than stored, and that it is not one of those leaderboard or guild rewards.
All 11 Index categories and where they come from
The Index tracks eleven categories, and each entry counts the same toward your total. A common sword is worth exactly as much as a mythic one for milestone progress, so the smart play is to clear the cheapest categories first.
| Category | Main source |
|---|---|
| Melees | Boss drops, trainer NPCs, special encounters |
| Swords | Trainer NPCs, boss drops, crafting |
| Clans | Clan Rerolls |
| Races | Race Rerolls from bosses and mobs |
| Auras | Aura Crates |
| Traits | Trait Rerolls on gear |
| Runes | Dungeon and Infinity Tower drops |
| Cosmetics | Cosmetic Crates, NPC and boss drops, events |
| Relics | Relic Parts crafted at the Relic Crafter, Crystal Defense |
| Bloodlines | Bloodline Stone rerolls |
| Titles | Boss kills, raids, events, milestones |
Index milestone rewards and max buffs
Every milestone is permanent and stacks within its own stat line. The buffs cover Damage, Luck, Crit Damage, Crit Chance, and HP. The original ladder topped out at 200 entries, and the King update added two higher tiers at 205 and 215.
| Entries | Upgrade | Total after upgrade |
|---|---|---|
| 5 | +5% Damage | Damage +5% |
| 10 | +5% Luck | Luck +5% |
| 20 | +5% Crit Damage | Crit Damage +5% |
| 30 | +1% Crit Chance | Crit Chance +1% |
| 40 | +5% HP | HP +5% |
| 50 | +7.5% Damage | Damage +12.5% |
| 65 | +10% Luck | Luck +15% |
| 80 | +7.5% Crit Damage | Crit Damage +12.5% |
| 100 | +1% Crit Chance | Crit Chance +2% |
| 120 | +10% HP | HP +15% |
| 140 | +10% Damage | Damage +22.5% |
| 160 | +10% Luck | Luck +25% (MAX) |
| 180 | +10% Crit Damage | Crit Damage +22.5% (MAX) |
| 200 | +1.5% Crit Chance | Crit Chance +3.5% (MAX) |
| 205 | +10% HP | HP +25% (MAX) |
| 215 | +10% Damage | Damage +32.5% (MAX) |
Fully maxed, the Index hands you +32.5% Damage, +25% Luck, +22.5% Crit Damage, +3.5% Crit Chance, and +25% HP. Pairing that crit chance bonus with a crit damage chestplate pushes your effective crit ceiling higher than it ever reached before the system existed. There are 229 entries in total, so you can skip a handful of limited drops and still clear the ladder.
Fastest order to reach 200 entries
Swords and melees worth prioritizing
Swords and melees are the slowest categories because many require trainer questlines, specific boss farms, or crafting materials. Grouping them by island cuts down on travel. Shibuya covers the Cursed Vessel, Limitless Sorcerer, and Cursed King trainer routes. Sailor Island handles Solo Hunter and Vampire King, and Hollow Island holds the Manipulator line, with Hollow Island and Boss Island together feeding the Soul Reaper trainer.
Direct buys are the quickest wins. Katana, Dark Blade, Gryphon, and Combat come from straightforward sellers, while Excalibur, Abyssal Empress, Anti Magic, Qin Shi, and Soul Reaper come through mode rewards or boss tickets. Dragon Goddess drops only from Sea Serpent and Kraken, so sea beast farming is its single route. Great Mage needs the Ancient Mage title, one Mana Core, and magic materials from the Easter Island trainer.
Note: Raa is not currently obtainable from its old Snow Island NPC, so trading is the only way to add it to the Index right now.
Clearing titles efficiently
Titles usually unlock after killing a specific boss a set number of times, with a small chance of an early drop and a guaranteed pity unlock once you hit the kill threshold. Boss Island in Sea 1 covers most of the standard title pool in one place. In Sea 2, Sun God and Cosmic Being run on a 30-minute respawn timer, so an AFK rotation or coordinated server hops through the official Sailor Piece Discord shorten the wait. You do not need every title to hit 200, so skip the rarest ones if the rest of your Index is nearly full.
Verifying your Index progress
Open the Index NPC and check the running total at the top of the menu. Each category tab shows owned versus available entries, so you can see exactly what is missing. After you equip a new item or finish a roll, the total updates immediately, and the milestone buff applies the moment you cross a threshold, with the new percentage visible in your stat panel.
If something you own is not counting, the fix is almost always the same. Make sure the item is equipped or in your active inventory rather than stored away, and confirm it is not a leaderboard aura or guild title. Hitting 200 entries is the practical goal for nearly every account, since the higher King update tiers ask for a few more entries and the remaining limited drops carry no extra reward beyond filling out the collection.
