Light Fragments come from beating the Light Raid boss (Bearer of Light) on Blue Planet in the Second Sea (C2) — they’re a raid boss drop, not something you can buy or pick up.
If you’re chasing Light V2 on the Sailor Piece, the Light Fragment is the material standing in your way, and there’s exactly one place it comes from. It isn’t sold by an NPC, it doesn’t drop off ordinary mobs, and it isn’t tucked away in a chest — you earn it by clearing a specific raid in the Second Sea. The catch is that the loop is gated behind C2 access and a fair bit of conflicting information about drop rates and costs, so here’s how the grind actually works.
What a Light Fragment does in Sailor Piece
A Light Fragment is the upgrade material you spend to unlock the Light V2 moveset on the Light Fruit. On its own it does nothing — it’s purely a currency for that unlock and, later, for the Light V2 F move.
Where to farm it: Blue Planet in the Second Sea
The first hard requirement is reaching C2 (the Second Sea). None of the Light progression exists in the First Sea, so if you’re still in C1 you simply can’t access the raid yet. Once you’re in C2, head to Blue Planet Island — this is the hub for everything Light-related, from fragment farming to the Light V2 unlock itself.
On Blue Planet, look for the Raid Portal NPC. This is the NPC that lets you start the Light Raid, and it sits right next to the Light V2 trainer — the old marine-looking NPC you’ll come back to later to actually buy the upgrade. Keeping them side by side is convenient: you farm at the Raid Portal and spend at the trainer a few steps away.
How to get a Light Fragment in Sailor Piece
Be in C2 first
Light Fragments are a Second Sea item, so you must already have access to C2 — there’s no Light content in the First Sea.
Travel to Blue Planet Island
This is the main hub for Light progression and Light V2, so it’s where all the farming happens.
Find and enter the Light Raid
Talk to the Raid Portal NPC next to the Light V2 trainer and choose the Light Raid specifically, not another raid on the same portal.
Fight your way to the boss
Clear the raid encounter until you reach the Bearer of Light at the end.
Defeat the raid boss
Beating the Bearer of Light is what rolls your reward.
Claim the Light Fragment
The fragment is awarded on a successful clear — reportedly a chance rather than a guarantee, so don’t count on every run dropping one.
Repeat until you have enough
Keep running the raid until you’ve banked the number of fragments your goal needs.
If you have a 2x drop chance boost active it can make the fragment look guaranteed — but the base drop isn’t, so plan for multiple raid clears rather than expecting one per run.
Video help
How many Light Fragments you need, and the Gem cost
| Goal | Light Fragments | Gems | Other requirements |
|---|---|---|---|
| Light V2 unlock | 5 | ~1 Billion (disputed) | Light Fruit equipped |
| Light V2 F move | 25 | ~2.5 Billion | Bearer of Light Title |
The number of fragments you’re farming for depends entirely on which goal you’re after, and the two goals are very far apart in cost. Unlocking Light V2 is the cheaper milestone; the Light V2 F move is a much longer grind layered on top of it.
For the base Light V2 unlock, players broadly agree on 5 Light Fragments, plus having the Light Fruit equipped and a large pile of Gems. The Gem figure is where sources split: most put it at around 1 Billion Gems, while at least one account lists 1 Million — so take the exact number as unconfirmed, but assume it’s steep either way. Once you’ve met all three, you return to the old marine NPC on Blue Planet to buy the upgrade.
The Light V2 F move is a separate, heavier ask: reportedly 25 more Light Fragments, roughly 2.5 Billion Gems, and the Bearer of Light Title. That title is said to drop from the same raid boss at only 0.67%–1.21% depending on difficulty, with a 125 pity safety net. The F-move NPC is a fishman found to the left of the large spacecraft, up on the highest mountain in that direction. All of these F-move figures come from limited reporting and may change, so treat them as a rough target rather than locked numbers.
Mistakes that waste raid runs
The most common trap is trying to farm fragments in the wrong place. They are raid-only and Blue Planet-only in C2 — grinding normal mobs, bosses outside the raid, or anything in C1 will never produce one. Just as important, the Raid Portal can host more than one raid (the Minotaur Raid, for example), and only the Light Raid drops Light Fragments, so double-check which raid you’re entering.
The second big mistake is assuming fragments alone equal Light V2. They don’t — you also need the Light Fruit equipped and the full Gem cost on hand. The Light Fruit itself comes from rolling at the Coin Fruit Dealer or Gem Fruit Dealer on Sailor Island in the first sea, so sort that out before you expect the unlock to go through. Plenty of players farm exactly 5 fragments, walk to the trainer, and find they’re still short on the rest of the kit.
After the fragments: Light Fruit, Gems, and the Title
Once the fragment loop is running, the rest of the Light V2 grind is really three side-quests. You’ll want the Light Fruit rolled from the Coin or Gem Fruit Dealers on Sailor Island, a reliable way to farm Gems at scale for that billion-plus cost, and — if you’re going all the way to the F move — the Bearer of Light Title from the same boss you’re already farming. Lining those up alongside your raid runs is the fastest path, since you’re standing in the right spot for the title every time you clear the raid anyway.
Frequently Asked Questions
Is the Light Fragment a guaranteed drop or just a chance from the boss?
Sources conflict. Some say it’s a 100% guaranteed drop — one fragment per successful clear — while others describe it as only a chance from the Bearer of Light. Drop-chance boosts like 2x can make it feel guaranteed when it isn’t, so the safest assumption is that you may need several runs.
Can you get Light Fragments in the First Sea (C1)?
No. Light Fragments and the entire Light progression live in C2 (the Second Sea). You must reach C2 and travel to Blue Planet before the raid is even available.
Do you need Raid Keys to start the Light Raid?
It’s unconfirmed. Some players report that Raid Keys farmed from C2 NPCs are required before starting raids, including the Light Raid, but this isn’t consistent across sources — check the Raid Portal NPC’s prompt when you arrive.
How many Light Fragments do you need for Light V2 versus the F move?
The base Light V2 unlock needs 5 Light Fragments (plus the Light Fruit equipped and Gems). The Light V2 F move reportedly needs 25 more, along with around 2.5 Billion Gems and the Bearer of Light Title.
Where is the Light V2 trainer on Blue Planet?
The Light V2 trainer is the old marine-style NPC standing right next to the Raid Portal NPC on Blue Planet. You farm fragments at the portal and bring them to the trainer a few steps away to buy the upgrade.
